Hi Just bought and installed Win7 Ultimate 64bit on my desktop pc. All quite wonderfull so far :). However I have major performance issues with network file transfer (for backup). My home server runs WinXP Pro 32bit. The day before I installed Win7 Ultimate 64bit on my desktop PC, I transfered all my pictures+docs to my server, it was around 32 GB and it took less than an hour. Now today, if I try doing the same from Win7 Ultimate 64bit to WinXP Pro 32bit, the transfer speed slows to below 1 mb/s within a minute. Facts : Network : All uses ethernet cables, only. NO Wifi, at all. Linksys router. Server PC: 100MB Ethernet WinXP Pro 32bit Shared folders Desktop PC: Nvidia nForce Ethernet (10/100/1000) Win7 Ultimate 64 bit Drivers up to date from Nvidia's site MB: Asus P5N-T Deluxe (nForce 780i chipset) Shared folders Transfer speed before (using WinXP 32, both machines): 32 GB less than an hour Transfer speed after (now using Win 7 Ultimate 64bit on desktop and WinXP Pro 32 bit on server): 32 GB, transfer speed drops way below 1mb/s within a minute and takes >12 hours if I where to let it complete. What I have tried: 1. RDC disable - no improvement 2. Force 100Duplex on both machines - no improvement 3. Update network drivers - no improvement 4. Transfer files either way - no improvement 5. Disable AutoTuning - no improvement 6. Installing IPV6 on my server - no improvement(however my router does NOT support IPV6 so that MIGHT by a FAR shot be a problem for Win7) 7. Use SyncToy to copy files - no improvement 8. Use explore copy/paste - no improvement 9. Googled for hours on end and attempted x number of other suggested fixes - no improvement Questions: 1. Does anyone know if this is a known problem for: Nvidia nForce drivers Windows 7 Ultimate 64 bit Other 2. Are there a fix underways? 3. Does anyone have any suggestions for fixes I might try or an actual solution? Last fact: Im desperate and frustrated :S. Will appreicate any helpfull/enlightenning comment :). Kind Regards Christian Mikkelsen

Opps forgot a couple of common ones: Desktop PC Uses AVG Free. 10. Tried uninstalling AVG Free - no improvement 11. Disabled firewall - no improvement 12. Tried downgrading to nForce drivers from version 15.51 to 15.35 - no improvement 13. Tried copying files using the free version of Total Commander - no improvement Thoughts: Should I try installing Windows 7 Ultimate 32 bit instead? Anyone who can help me out :) ?

Have you ruled out any CPU utilization issues, such as disabling anti-virus or other background processes? You can simply check the task manager for that.Maybe try booting to the Windows 7 disc, and from a command prompt (Recovery environment), copy some files to see if it is just as slow. That may help determine if you have an environment-specifc issue with your Windows 7 installation or a hardware problem.

I have tried disabling (actually completely uninstalling) my anti virus (AVG Free) with no result. Have just attempted: 14. Map the network drive + copy from command line - no improvement The task mgr network utilization shows high spikes very 10 sec or so, but then drops to 0 for 10 secs. The CPU utillization shows a 1-2% utilization. Im running a DualCore Intel E8500 3.16 Ghz, with 4 GB Ram FSB 1333(As far as I remember. Thx for the suggestion, I will try using the Windows 7 disc now and write back afterwards. Kind regards Christian Mikkelsen

I tried by booting but it made no difference :(. Thx though for the suggestion.

Since you seemed to have covered a good bit a troubleshooting, the only other thing I can suggest off the top of my headis trying a different NIC if you have one available. Maybe Windows 7is being tempermental with the Nvidia.

Don't think I have that option, but I'll have to look through my old stuff first :). Just keeps bugging me that everything else seems to run smoothly, browsing via network, remote desktop, etc, but just not file transfers :S.

To determine if it is an SMB (File and Print Sharing)issue, you could try using another method such as FTP or WebDAV. I have not heard of any issues going between Windows 7 and XP myself, but you never know. If I recall correctly, XP Pro includes IIS FTP and maybe WebDAV.If it doesn't,you can download a free FTP server such as WarFTP and try that.

Tried the FTP without any luck. Also tried copying via apps like GBridge, since the RDP seems to run smoothly, but it gave the same result, nada! Im going to do a fresh install of Win7 Ultimate 64 Bit, to give it one last shot, keeping an extra eye on the driver installation sequence and hope for the best. But if anyone out there can think of any explanation why the transfer speed starts high and drops to less than 1 Mb/s, please give me hint :), cause im going nuts (have to do manual external drive backup until this is fixed :S ). I believe it to be either: a. The nForce drivers from nvidia (using newest 15.51 whql) - My motherboard is a P5N-T Deluxe, i780 chipset b. Some secret limitation "feature" in Windows 7 Ultimate which is not functioning prober.... yet. Will write back if I find a solution. Kind regards Christian Mikkelsen

Try RichCopy. It's not a fix for the problem but you might get better throughput.http://technet.microsoft.com/en-us/magazine/2009.04.utilityspotlight.aspxTom

Wow thx Thomas. I've been using Robocopy for a long time now, but this here is definitly a big improvement and better alternative by the looks of it. Im digging into it as speak, thx a mil :). Kind Regards Christian Mikkelsen

Hi Just a followup. I reinstalled Windows from scratch with drivers, keeping an ekstra eye on the installation order and boom everything is working top notch. Guess I must have made some kind of error during the initial installation or a fix in either a driver or windows have been released. Anyhow I'm a happy guy with a good transfer rate again. Using both Robocopy and RichCopy for backup now :). Kind regards Christian Mikkelsen

Good to know. We will probably never know what caused the orogonal problem. I am glad it is OK now.Tom

Just great :( ...reinstall??? Did your problem every resurface after reinstall? I see this only when network copy large (~4GB) files from windows 7 -> 1 particular WinXP system. Here is what does and doesnt work: windows7 winxp sys1 winxp sys2 linux x------------------> 19MB/Sec, then randomly hangs in 0-5 minutes x---------------------------------------> 19MB/Sec <----------------x 30MB/sec <-----------------------------------x 30MB/sec <--------------------------------------------------------> 45MB/sec (wow! copy to/from linux MUCH faster) All above was done with the integrated 1GB ethernet in my system: Realtek PCIe GBE. As a test I disabled the integrated, and installed an Intel PCIe ethernet, ...SAME PROBLEM.

Yes, I agree. I don't think a re-install is an adequate solution. I am having same problem as original poster and have done most of the same steps. Windows 7 64bit Professional edition. Same issues going from Win7 ---> WinXP sp3, but not the other way around. I have seen many with this issue (and probably a lot more that goes unreported from clueless users). Any other ideas what it could be? It seems to me that it hangs soon after it is "discovering" the files it needs to copy. Sometimes it will fail during the copy several times.

Yes, I agree. I don't think a re-install is an adequate solution. I am having same problem as original poster and have done most of the same steps. Windows 7 64bit Professional edition. Same issues going from Win7 ---> WinXP sp3, but not the other way around. I have seen many with this issue (and probably a lot more that goes unreported from clueless users). Any other ideas what it could be? It seems to me that it hangs soon after it is "discovering" the files it needs to copy. Sometimes it will fail during the copy several times. OK, I believe I have fixed this issue without a reinstall. My best guess is the reason the guy above had his issue fixed with a reinstall is because during the 2nd install he chose not to be part of a Windows 7 "Homegroup". To fix the dreadfully slow file copy issue FROM a Win7 x64 system TO a WinXP x32 file share/server, etc. Turn off the Windows 7 Homegroup feature by "leaving" it. This can be located in: Control Panel\Network and Internet\HomeGroup Make sure you have Network discovery, Public Folder Sharing, File and Printer Sharing, etc. ON in both your network profile here as well: Control Panel\Network and Internet\Network and Sharing Center\Advanced sharing settings Logoff when prompted and Reboot Note: You can still be part of a windows workgroup, but leave the homegroup. Once you do that your file copy issues should be solved. I didn't 'find' this solution, but I started thinking about network discovery and offline files in Win7. The offline files feature I believe is what causes this bug, but not sure. Anyway, it's an easy thing to try and if it doesn't work you can easily revert back. This change fixed my file transfer issues completely. What was taking hours to copy from Win7 Pro to an XP sp3 system now takes a minute or two. -footballcoach

RE: " OK, I believe I have fixed this issue without a reinstall. My best guess is the reason the guy above had his issue fixed with a reinstall is because during the 2nd install he chose not to be part of a Windows 7 "Homegroup"." OK, I TRIED THIS, It made no difference whatsoever for me. Copy from Win7 --> WinXP sp3 still stalls 1 to a few minutes after starting it. And just like indicated by others, a WinXP sp3 --> Win7 copy is no problem...

Here's another victim... recently reinstalled a HP Compaq 6715s laptop with Win7 64bit. The My Documents folder is on a share of my WinXP 2005 Media Center system, with offline files enabled. I did pick the option to join a home group during install. As per instructions by footballcoach, I dropped the home group (to make sure, I disabled both 'homegroup xxxx' services as well, after I left the homegroup). Its my wifes business laptop, so I'll have to wait and see whether her long delays when saving files are gone now. Will drop the results here later.

I'm also having a similar issue with a factory installed Alienware laptop. (Also speaking to their tech support in parallel.) Either using the gigabit card or wireless card I can get 700-800K downloads from the internet (max my ADSL can handle) but transfers on my network between either an XP laptop, Win7 x64 ultimate or my DNS323 NAS max out at 150K and are normally around 100K. The steps I've tried so far include all of the above that have already been tried and I'm stumped. Seems very odd as FTP speeds on my network are also identically affected. I do have AVG Internet Security installed, but I disable the firewall and still get the same problem.

Has anyone found anything else? I too have slow speeds transfering files windows 7 to windows 7 and windows 7 to xp. Also have Slower speeds transfering from Server 2008 to a windows 7 machine and vice versa. 3rd Party programs are not an option.

Yes, I agree. I don't think a re-install is an adequate solution. I am having same problem as original poster and have done most of the same steps. Windows 7 64bit Professional edition. Same issues going from Win7 ---> WinXP sp3, but not the other way around. I have seen many with this issue (and probably a lot more that goes unreported from clueless users). Any other ideas what it could be? It seems to me that it hangs soon after it is "discovering" the files it needs to copy. Sometimes it will fail during the copy several times. OK, I believe I have fixed this issue without a reinstall . My best guess is the reason the guy above had his issue fixed with a reinstall is because during the 2nd install he chose not to be part of a Windows 7 "Homegroup". To fix the dreadfully slow file copy issue FROM a Win7 x64 system TO a WinXP x32 file share/server, etc. Turn off the Windows 7 Homegroup feature by "leaving" it . This can be located in: Control Panel\Network and Internet\HomeGroup Make sure you have Network discovery, Public Folder Sharing, File and Printer Sharing, etc. ON in both your network profile here as well : Control Panel\Network and Internet\Network and Sharing Center\Advanced sharing settings Logoff when prompted and Reboot Note: You can still be part of a windows workgroup, but leave the homegroup. Once you do that your file copy issues should be solved. I didn't 'find' this solution, but I started thinking about network discovery and offline files in Win7. The offline files feature I believe is what causes this bug, but not sure. Anyway, it's an easy thing to try and if it doesn't work you can easily revert back. This change fixed my file transfer issues completely. What was taking hours to copy from Win7 Pro to an XP sp3 system now takes a minute or two. -footballcoach I could drag something into my Win7 folder while on the WinXP computer, but I couldn't transfer a file either direction from the Win7 computer. This solution worked for me! Thanks

I am running Windows 7 64-bit and have two nVidia nForce Ethernet 10/100/1000 ports (driver 73.2.0.0) on my motherboard (XFX nForce 780i 3-Way SLI). I recently bought a Netgear ReadyNAS Duo and found it very slow to copy my files onto the NAS. I am connected using cables via a BT HomeHub 2. The Networking tab of the Windows Task Manager showed only 3-5% Network Utilization. Having read lots of Forums and suggestions I tried disabling everything on the Network Adaptor. Now I get really good transfer rates and the Network Utilization is 80-90 %. I found the settings in Start -> Control Panel -> Network and Internet -> Network and Sharing Center and clicked on Change Adaptor Settings on the left-hand pane. Then right-clicked the Adaptor icon and selected Properties. Then clicked the Configure button and seleced the Advanced tab. These are the settings I have that I set to Disabled (Device sleep on disconnect, Flow Control, Interrupt Moderation, IP Checksum Offload, 3 x Large Send Offload, Low Power Idle Mode, Low Power State Link Speed, Priority & VLAN, Receive Side Scaling, 4 x Checksum Offload, Wake on Magic Packet, Wake on pattern match, WakeOnLAN From PowerOff). I left the Speed/Duplex Settings as Auto Negotiation.

I experienced similar problems to those described in this thread - my Internet downloads froze, and local network copies were painfully slow. In particular, I observed that large file copies from XP to Win7 achieved 80-99% network utilization as shown by the task manager whether "pull" from Win7 or "push" from XP, but the reverse only achieved 1% network utilization. The post by Stan17 proved helpful, but I felt it was worth exploring which of the many settings he disabled was the culprit (realizing it could have been a combination). I found that the Large Send Offload v2 was the culprit, and I left both IPv4 and IPv6 disabled. My settings, slightly different from those listed by Stan, were: ARP Offload - Enable Ethernet@WireSpeed -Enable Flow Control - Auto Interrupt Modulation - Enable IPv4 Checksum Offload - Rx & Tx Enabled Large Send Offload (IPv4) - Enable Large Send Offload v2 (IPv4) - Disable Large Send Offload v2 (IPv6) - Disable Network Address - Not present (radio button) NS Offload - Enable Priority & VLAN - Priority & VLAN Enabled Receive Side Scaling - Enable RSS Queues - RSS 4 Queues Speed & Duplex - Auto TCP & UDP Checksum Offload (IPv4) - Rx & Tx Enabled TCP & UDP Checksum Offload (IPv6) - Rx & Tx Enabled VLAN ID - 0 Wake Up Capabilities - Both WOL Speed - Lowest Speed Advertised The settings above provided satisfactory file transfer results - nearly 99% network utilization for file transfers both ways. Enabling Large Send Offload v2 (IPv4) triggered the slow file transfers which sent me looking for this thread. None of the other proposed solutions I found here and elsewhere worked for me - removal from HomeGroup, disabling autotuning with the netsh command, disabling RSS, removal of IPv6, etc. Thanks to Stan for posting such a detailed reply. I hope Microsoft will explore what is wrong with Large Send Offload v2.

Thank You John That was it. Set Large Send Offload v2 (IPv4) - to Disable and Poof! From 1Mb to 33mb in seconds. Thank you

I have had this problem for MONTHS between a Server 2008 machine and Windows 7 Business machine. I have tried so many things including replacing nics and drivers of all flavors. The solution was to disable the Large Send Offload IPv4 AND IPv6 on the Windows 7 PC. That did it!! Finally!!! I had disabled Large Send Offload on the Server but that didn't help. I had disabled Large Send Offload on the Windows 7 machine but only IPv4. The trick is to disable both IPv4 and IPv6. Thank you so very much for solving this frustrating problem. I feel like I have a brand new computer that is soooo fast!!!

I experienced similar problems to those described in this thread - my Internet downloads froze, and local network copies were painfully slow. In particular, I observed that large file copies from XP to Win7 achieved 80-99% network utilization as shown by the task manager whether "pull" from Win7 or "push" from XP, but the reverse only achieved 1% network utilization. The post by Stan17 proved helpful, but I felt it was worth exploring which of the many settings he disabled was the culprit (realizing it could have been a combination). I found that the Large Send Offload v2 was the culprit, and I left both IPv4 and IPv6 disabled. My settings, slightly different from those listed by Stan, were: ARP Offload - Enable Ethernet@WireSpeed -Enable Flow Control - Auto Interrupt Modulation - Enable IPv4 Checksum Offload - Rx & Tx Enabled Large Send Offload (IPv4) - Enable Large Send Offload v2 (IPv4) - Disable Large Send Offload v2 (IPv6) - Disable Network Address - Not present (radio button) NS Offload - Enable Priority & VLAN - Priority & VLAN Enabled Receive Side Scaling - Enable RSS Queues - RSS 4 Queues Speed & Duplex - Auto TCP & UDP Checksum Offload (IPv4) - Rx & Tx Enabled TCP & UDP Checksum Offload (IPv6) - Rx & Tx Enabled VLAN ID - 0 Wake Up Capabilities - Both WOL Speed - Lowest Speed Advertised The settings above provided satisfactory file transfer results - nearly 99% network utilization for file transfers both ways. Enabling Large Send Offload v2 (IPv4) triggered the slow file transfers which sent me looking for this thread. None of the other proposed solutions I found here and elsewhere worked for me - removal from HomeGroup, disabling autotuning with the netsh command, disabling RSS, removal of IPv6, etc. Thanks to Stan for posting such a detailed reply. I hope Microsoft will explore what is wrong with Large Send Offload v2. Where do i find these setting so i can change mine? Thanks.

This should get you there 'from scratch': - Start Menu -> Control Panel - Network and Internet - Network and Sharing Center - Choose Connection ("Local Area Connection" or your wireless connection; near the top on the right) - Press "Properties" button - Press "Configure" button - Pick "Advanced" tab The properties will appear in the listbox at left. When you select a property the current choice appears in the dropdown at right, and the dropdown has your other choices.

Wow, Thank you to everyone who posted on this thread. I have been trying to resolve my network speed problems for about a week now. A week ago I copied a 2GB+ file from one win7 pc to another and it took a lot longer then I expected so I decided to see what was happening. I used Task Manager "Network" tab and noticed that when copying large files I would typically see 90-95% utilization for about 5-8 seconds then utilization would drop to 0% for about 5-10 seconds. This would continue until the file was copied. Only seamed to happen with files above 1GB During the course of the past week I tried a lot of "google solutions" most, if not all, are listed here but with no improvement. Found this sight this morning and am happy to say the following worked for me. . Large Send Offload v2 (IPv4) - Disable Large Send Offload v2 (IPv6) - Disable Thank you

I have tried every solution I could find searching these post, yet nothing has resolved the slow file transfer problem. No matter what I do transfers always start out around 500K/s then within 2 seconds drop to <200K and network utilization never exceeds 3%. What I have tried: 1. RDC disable - no improvement 2. Force 100Duplex on both machines - no improvement 3. Update network drivers - no improvement 4. Transfer files either way - no improvement 5. Disable AutoTuning - no improvement 6. Large Send Offload v2 (IPv4) - Disable - no improvement 7. Large send Offload v2 (IPv6) - Disable - no improvement 8. Use RichCopy to copy files - no improvement 9. Use explore copy/paste - no improvement 10.Googled for hours on end and attempted x number of other suggested fixes - no improvement 11.Removed from Home Group - no improvement 12.Replaced Eth. cables - no improvement Win7 Pro 64bit ver. 6.1.7600 build 7600 i5 760 2.8GHz Asus P7H55-M Pro w/latest bios onboard Realtek 8112L Gigabit Lan adapter 6Gig RAM 1T Hitachi HDs721010CLA332 SATA Optowrite DVD r/w IDE GeForce 9500GT w/1G RAM About the only thing I have not done is to reinstall Windows, but that just seems too extreme. There has to be an answer as to why this is happening. Are there any diag tools which can point where to look or are there any other solutions out there that I have not yet come across and tried? Appreciate any help, Paul

I've tried several solutions, the one that ended up solving this for me was to disable the SMB2 protocol. So far I've only done it on a couple of Win7 workstations, but it seems to work. Open a command prompt as Administrator and copy/paste the following two commands and reboot. sc config lanmanworkstation depend= bowser/mrxsmb10/nsi sc config mrxsmb20 start= disabled I thinks it's a bad workaround, but so far this is working. I cannot remember where I found the solution, so I cannot take credit for this myself ! It should also work if you disable SMB2 on the server. Hope it works ! Best regards, Tommy

I experienced similar problems to those described in this thread - my Internet downloads froze, and local network copies were painfully slow. In particular, I observed that large file copies from XP to Win7 achieved 80-99% network utilization as shown by the task manager whether "pull" from Win7 or "push" from XP, but the reverse only achieved 1% network utilization. Same here! Though I was copying to/from a samba share (ooo, I know, I'm bad). Copying from samba was lightning fast, while copying to the samba share was dog slow. We're talking about huge difference here... copying from samba was at roughly 100MB/sec (800mbit), while copying TO samba was often 4MB/sec. (Factor of 20 difference!) I disabled ipv4 offloading, and while copying to is not quite as fast as copying from, it's a night and day difference! Now I can copy up at roughly 600Mbps -- good enough to stop looking and just be happy!

Thank you for the suggestion. Unfortunately no change in transfer speed after making the change and restarting. So, I can now add disable SMB2 to the list of things tried. I don't know how this could have an affect on any of this, but the switch my PCs are connected to is a Cisco 2950 running IOS 12.1(22)EA10

Pmona2000 wrote: "I have tried every solution I could find searching these post, yet nothing has resolved the slow file transfer problem. No matter what I do transfers always start out around 500K/s then within 2 seconds drop to <200K and network utilization never exceeds 3%." I have the exact same problem on a toshiba laptop running windows 7 64bit on my network. My other 3 computers on the network run windows XP and copy files at about 8MBytes/s. Now this is the interesting part: I connected my windows 7 laptop directly to an XP computer using a crossover cable, and now file copying works fine! So could there be a compatibility problem between my network and windows 7 ? I've tried 2 different switches and one hub, all work fine copying files with XP, but not with windows 7. So anyone got any idea why using a crossover cable works, and can this be used to find a fix to the problem ?

I don't believe it is a network problem. As a test I installed winscp on both my Win7 and XP boxes. Using winscp I was able to transfer files at full line rate to my Linux servers. It seems to only be a problem between windows machines, specifically, win7 machines and others. Between two XP machines, transfers are full rate. This leads me to believe it is a SMB problem. When I experience the slow transfers, it is between shares mapped on each of the machines.

I was able to test using FTP between my windows PCs and see a small increase in transfer rates, but it is still well below what it should be. While on the XP box and pulling a file from the WIN7 box, I was getting ~500K, and pushing a file I was able to get 2M; so roughly 5% and 20% network utilization respectively.

I've been doing some more testing over theweekend. On my windows 7 computer I now have: Disable TCP AutoTuning and Receive Side Scaling. Turn off the Windows 7 Homegroup Turned off ALL Task Offload settings on the network adapter and set Speed and duplex to 100Mbps full duplex. As before, Copying any files between any windows XP computers on the network works fine at about 8Mbytes/sec. I can now copy files from any windows XP computer to my windows 7 computer at about 8Mbytes/sec. However, copying the same files from windows 7 to windows XP transfers at only 200kbytes/sec. (about 2% utilization) It does not make any difference wheter the file transfer is initiated from a windows XP or a windows 7 PC, it is the direction of copy that makes the differernce. I can get file copying to work fine both ways by using a cross over cable. When I connect the crossover cable to the windows 7 computer, it makes the connection an "unidentified public network" in Network and sharing centre. I then click on the network (the bench symbol) select turn on discovery and file sharing, and make it a private network. Now file copying both ways will work just fine, but as soon as I connect the two computers back on the network, the problem is back. I've also used Microsoft Network Monitor 3.4 to do a network trace. The trace covers copying a single 3MB file from windows XP to windows 7 and takes less than 1 second. Then I have copied the same file from windows 7 to windows XP. This copy takes over 25 seconds. Now I need to find someone that can analyze the trace, or work out why using a crossover cable works.

moved to this thread: Why is Windows 7 so slow in copying network files? http://social.technet.microsoft.com/Forums/en/w7itproperf/thread/4537c7b6-9761-41c5-8b47-0ecb831c8575

I've got an equal or the same issue here: My network consists of: - Windows 7 x64 Pro Desktop PC (this is my one) - Win XP 32 Pro Desktop (my wife's) - Ubuntu x64 Server (A Backup server) If I copy data from my PC to the server, I get the full 100MBit throughput. But if I copy data from my to my wife's PC, the transfer rate drops to ~300kb/s. The funny thing is, that if my wife copies data from my drive to her's, she can use the full bandwitdh... This problem exists since the last reinstallation of Win7. Before, I was able to use the network in full speed... But I do not want to reinstall my windows to possibly remove the network error...

When will microsoft admit there is a problem with running windows 7 to an xp computer. this problem has been happening since day 1. I have also turned off all of the tuning, compression, ipv6, this and that. it is a turtle to copy or start a program on a windows 7 box through the network from the xp machine. also see the problem on sbs 2003 server all xp computers on the network start the database program quickly. the new windows 7 box SAS.

Using Windows 7 Ultimate and Windows Server 2008 R2 Two machines, connected via 1GB 1000base-T LAN, with a 1Gb switch between... and yes, I've tried swapping cables and ports. Server has two RAID5's, a 6 platter and an 8 platter. Workstation has two RAID5's, a 3 SSD and a 4 platter. Both sides using Intel CPU's and a RealTek 8100C chipset Gb LAN, same LAN drivers. Using Windows Explorer to COPY a 20GB file: Server Disk1 to Server Disk 2: >250MB/s (Server disk I/O isn't an issue). Server Disk2 to Server Disk 1: >250MB/s (Server disk I/O isn't an issue). Workstation Disk1 to Disk2: >150MB/s (Workstation disk I/O isn't an issue). Workstation Disk2 to Disk1: >150MB/s (Workstation disk I/O isn't an issue). Server Disk1 to Workstation Disk2: 91MB/s (near 100% LAN utilization). All looks good so far: Workstation Disk2 to Server Disk2: 25MB/s declining to 17MB/s; occasionally as low as 9MB/s. Some of the changes listed above appeared to work for a few moments. I've seen as high as 90MB/s for a few seconds, but it declines rapidly under 30MB/s... so no fix that has lasted. It appears there is something in Windows 7 that prevents fast transmits; or something in Windows Server 2008 that blocks fast receives. I have set the server-side receive training to disabled, normal, highlyrestricted, and experimental and the Win7 side to off, normal, and highlyrestricted in various combinations. Again, nothing concrete to report as an improvement. What would the MS Gurus suggest I do with NetMonitor as far as capturing something worth their time to diagnose?

I've got an equal or the same issue here: My network consists of: - Windows 7 x64 Pro Desktop PC (this is my one) - Win XP 32 Pro Desktop (my wife's) - Ubuntu x64 Server (A Backup server) If I copy data from my PC to the server, I get the full 100MBit throughput. But if I copy data from my to my wife's PC, the transfer rate drops to ~300kb/s. The funny thing is, that if my wife copies data from my drive to her's, she can use the full bandwitdh... This problem exists since the last reinstallation of Win7. Before, I was able to use the network in full speed... But I do not want to reinstall my windows to possibly remove the network error... This issue seems to be running rampat among Win7 users trying to network to non-Win7 machines. The following link has also been covering this topic in detail. Check the troubleshooting steps I've taken towards the bottom of the thread. http://social.technet.microsoft.com/Forums/en/w7itproperf/thread/4537c7b6-9761-41c5-8b47-0ecb831c8575

This issue seems to be running rampat among Win7 users trying to network to non-Win7 machines. The following link has also been covering this topic in detail. Check the troubleshooting steps I've taken towards the bottom of the thread. http://social.technet.microsoft.com/Forums/en/w7itproperf/thread/4537c7b6-9761-41c5-8b47-0ecb831c8575 Win7 and Server2008R2 are essentially the same version of Windows... 'cept server doesn't have all the "user friendlies" attached (they can be added tho). And most of the posts above yours discuss Windows to Windows slowness, including references to the "other" thread suggestions that don't work for us. So unless you can add "Helpful" commentary?

I had this same issue with a Windws 7 SP1 Enterprise box (HP DC7700SFF), eventually and after much struggle, I came to find the cause of my nighmares. It was a poor quality ethernet cable and the switch were this computer was connected (Ovislink NSH5A) that were not understanding each other, possibly due to the poor ethernet cable performance. Changed the ethernet cable for a good quality new one and this made the transfer rate to swoop up to a whopping 20Mb per second.

Try the following... http://support.microsoft.com/kb/935400

Please check my following article: http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Windows/XP/A_9310-Windows-vs-Linux-throughput-and-persistent-routes-windows-pc-slower-file-transfer.html

Very interesting article. Can you please put that in laymans terms that the rest of us can understand?Kirk Gustafson

I did try ALL of the recommendations. No significant help, what so ever. What did work was disabling Windows Search (by disabling the Windows Search indexing service). As a side note, most folk don't know the average SATA 3Gb/s HDD can't maintain or sustain 100MB/s (thus can't keep a 1GbE pipe full). Some disks are pretty lame and barely keep the 1GbE link at 33%. Other notes: Explorer copies are slowest; Robocopy is pretty fast - faster if you make use of the multi-threading options; Richcopy blazes, but with the caveat it often misses files because they are in use -- so watch your logs when copying important folders.

Wow, Thank you to everyone who posted on this thread. I have been trying to resolve my network speed problems for about a week now. A week ago I copied a 2GB+ file from one win7 pc to another and it took a lot longer then I expected so I decided to see what was happening. I used Task Manager "Network" tab and noticed that when copying large files I would typically see 90-95% utilization for about 5-8 seconds then utilization would drop to 0% for about 5-10 seconds. This would continue until the file was copied. Only seamed to happen with files above 1GB During the course of the past week I tried a lot of "google solutions" most, if not all, are listed here but with no improvement. Found this sight this morning and am happy to say the following worked for me. . Large Send Offload v2 (IPv4) - Disable Large Send Offload v2 (IPv6) - Disable Thank you Thank you guys so much. I have 5 pc's networked in the house with various media files on each. Everything worked fine except for one hardwired pc. It could grab files just fine but if I tried playing a video file or copying a file off of that pc I would only get 80kb/s. I set Large Send Offload v2 (IPv4) - Disable Large Send Offload v2 (IPv6) - Disable and all issues were resolved!

Yes, I agree. I don't think a re-install is an adequate solution. I am having same problem as original poster and have done most of the same steps. Windows 7 64bit Professional edition. Same issues going from Win7 ---> WinXP sp3, but not the other way around. I have seen many with this issue (and probably a lot more that goes unreported from clueless users). Any other ideas what it could be? It seems to me that it hangs soon after it is "discovering" the files it needs to copy. Sometimes it will fail during the copy several times. OK, I believe I have fixed this issue without a reinstall. My best guess is the reason the guy above had his issue fixed with a reinstall is because during the 2nd install he chose not to be part of a Windows 7 "Homegroup". To fix the dreadfully slow file copy issue FROM a Win7 x64 system TO a WinXP x32 file share/server, etc. Turn off the Windows 7 Homegroup feature by "leaving" it. This can be located in: Control Panel\Network and Internet\HomeGroup Make sure you have Network discovery, Public Folder Sharing, File and Printer Sharing, etc. ON in both your network profile here as well: Control Panel\Network and Internet\Network and Sharing Center\Advanced sharing settings Logoff when prompted and Reboot Note: You can still be part of a windows workgroup, but leave the homegroup. Once you do that your file copy issues should be solved. I didn't 'find' this solution, but I started thinking about network discovery and offline files in Win7. The offline files feature I believe is what causes this bug, but not sure. Anyway, it's an easy thing to try and if it doesn't work you can easily revert back. This change fixed my file transfer issues completely. What was taking hours to copy from Win7 Pro to an XP sp3 system now takes a minute or two. -footballcoach This worked great for me. Leaving the homegroup on all of my Windows 7 PC's stopped the ridiculous lag when transferring data from one computer to another.

Autotuning, RDC, duplex, etc didn't make a difference for me. What it turned out to be was power managment. I disabled power management from the configure button for the NIC. From the "advanced" tab, I disabled "energy star" option. Network copies went from 4-5MBps to 60-118MBps. This was a Marvell NIC On a 2nd computer, with a Realtek NIC, the "green ethernet" and "energy efficient ethernet" that needed to be disabled. On a 3rd, with an Intel NIC, it was "energy efficient ethernet", "reduce link speed during standby" and "reduce link speed during system idle" Jumbo frames didn't make a difference until the power management options were changed.

THXXXXXX this fixed it

Thanks very much John, this worked perfectly. I had been struggling for a week with this and tried most of the other solutions proposed before I found your post. This fixed it right away! I have both a Thecus NAS and a NetGear ReadyNAS Duo that I could download from at 35MB/s but writes back were down to around 200KB/s! I now have consistent reads/writes at around 25MB/s. Thanks again!

I've been struggling with this for nearly a week. Found John Elion's fix, ran it and bingo! All's good. Did these power management things too - just to really hammer it home and now all is sweetness and light. But, you've got to ask what's going on with Microsoft when a topic like this can run, unfixed, from Oct 09 to Jan 11 / Mar 12. It's not as if file copy were a rarely used or trivial function. I'm baffled 'ere. Anyway, my purpose in writing is really just to thank all you people who put the effort in end eventually did the vendors' job for them. Thanks John Elion and smjain.Ray

This is the most frustrating Win7 problem with an answer that has eluded almost every forum on the internet regarding its solution. ....UNTIL NOW I have heard every bogus solution/......too many to mention. The problem for everyone is the same.... WIN7 Terribly Slow file transfer (kilobits,),,Slow FILE Copy..over networks, drive to drive,, usb to drive'.. blah blah blah.. This is the only solution that has taken my file/copy/transfer/network write speeds from mere kilobits per second... up to 15+mb per second from usb to sata. Go To Start... type "CMD" hit enter.. copy and paste each of these 3 lines below, ONE AT A TIME and hit enter...you will get an OK after each successful entry.. Then restart your computer test out your fast speeds....Then curse every hack that told you to download a "file transfer manager" to fix such a basic windows function . netsh interface tcp set global rss=disabled netsh interface tcp set global autotuninglevel=disabled netsh int ip set global taskoffload=disabled

I've had this problem for almost a year, and not yet found a solution until now. ^^ Step 2 did it for me, thanks! :D