I have one Win7-64 Pro PC on a workgroup with several WinXP SP3 pcs. Filesharing is non-functional when copying files from shares on the Win7 machine to XP machines. When I try to copy a file from Win7 to XP, the copy dialog stalls at "Discovering Items" and will cancel after a minute or so. However, from the Win7 machine I can pull files from XP machines to the Win7 shares without problem. I can also from the XP machine push or pull files between the XP machines and Win7 shares without problem. This behavior is present whether or not the windows firewall is enabled or disabled, and Avast antivirus is enabled or disabled. I can ping all machines in the workgroup from Win7 to XP and vice versa. All machines show up on the network map. It doesn't matter if the shares are root directories or folders on the XP machines. I have enabled file sharing (R/W) on all shares on the XP machines. On the Win7 machine, I have disabled password protected sharing, 40/56 bit encryption is selected, file sharing is on with Everyone having R/W access, network discovery is on, etc. Any suggestions?

Hmm. Crickets.I can only assume that I've done everything right, yet file sharing still doesn't work properly.I've had to work around the problem by using UltraVNC to open a virtual desktop on my XP machine, open Windows Explorer and push and pull files onto and off of the Win7 machine as needed.I hope, given the huge volume of postings concerning file sharing with Win7 that a hotfix or SP1 from MS will fix the problems.Aside, how come no one testing the betas and RCs found these problems, and if they did why does it still not work without herculean effort? Win7 network troubleshooter wizard are no help, but one allowing users to Win7 to work with XP would be very welcome.

Update: One of my XP machines, a laptop connected to my wireless router via 802.11.g is able to receive files send from my Win7 machine.The router is a Linksys WRT54GL. No wireless encryption.What should I be looking at? My router? My Gig-E switches? Anything?

I would suggest looking more closely at the computer that is exhibiting the problem, in most instances the type of problem is caused by a confluence of issues often related to third party Firewalls (Comodo, ZoneAlarm, etc), Internet Security Suites (Nortons, McAfee, AVG, etc) and other such software the impact the network by monitoring files that are crossing it and simply "Turning them Off", or "Disabling Them" is often not enough....you will often have to uninstall them for proper troubleshooting, however; sometimes you can try booting into "Safemode With Networking" to see if the problem persists or perhaps doing a clean boot of the problematic machine. So since Win7 and at least one of your XP machines are playing well together and assuming that they are using the same network devices as the XP machine that seems to have a problem, I would definitely look at that XP machine and see if there is something specific to it that doesn't exist on the other one.

If I turn off the windows firewall on the XP machine, and then reboot, I can transfer files from win7 to xp no problem.If I then turn on the xp firewall, file transfers don't complete (a 400 Mb file gets about 2/3 of the way finished), then I get a message saying the xp drive is not connected to the network.If I then turn the xp firewall off, file transfers still don't work. I need to reboot the xp machine with the firewall off for file transfers to work.BTW, the xp firewall ports are TCP 139, 445 and UDP 137, 138. Do I need to open any more ports on the xp side for win7 file sharing to function?

Hi, Please try the following: 1. Disable Task Offload in Windows XP: 1) Click Start, click Run, type regedit, and then click OK. 2) Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters 3) In the right pane, make sure that the DisableTaskOffload registry entry exists. If this entry does not exist, follow these steps to add the entry: a) On the Edit menu, point to New, and then click DWORD Value. b) Type DisableTaskOffload, and then press ENTER. 4) Click DisableTaskOffload. 5) On the Edit menu, click Modify. 6) Type 1 in the Value data box, and then press ENTER. 7) Exit Registry Editor. 2. Disable RSS and TCP Offload: 1) Click Start, click Run, type regedit, and then click OK. 2) Locate the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters 3) Right-click EnableTCPChimney, and then click Modify. 4) In the Value data box, type 0, and then click OK. 5) Right-click EnableRSS, and then click Modify. 6) In the Value data box, type 0, and then click OK. 7) Right-click EnableTCPA, and then click Modify. 8) In the Value data box, type 0, and then click OK. 9) Exit Registry Editor, and then restart the computer. Hope this helps. Thanks.Nicholas Li - MSFT