Hi team, I am experience slow network response from some Windows Vista users stations when trying to open a spreadsheet file from a network share resource using UNC browsing. Sometimes, it takes more than 5 minutes to open a file wich in another Windows XP user station takes only few seconds. TCP/IP settings already all checked! Is there any auto tunning or MTU size on Windows Vista that I could disable or set to improve this or, perhaps, solve it? Hope I was clear enough.Doria

Hi, You can disable autotunning feature using the following command in elevated privilege: netsh int tcp set global autotuninglevel=disabled If you have any problems, then to turn auto-tuning back on type the following in Command Prompt: netsh int tcp set global autotuninglevel=normal Best Regards Dale Qiao TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi Dale Qiao, Thanks for your answer. Perhaps, no change occurred. Anything else should I check? Thanks,Doria

What about accessing the shared folder using \\ipaddress\folder? BTW,please boot in Safe Mode with Networking and access the shared folder for a test. Best Regards Best Regards Dale Qiao TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi Dale Qiao, On safe mode, it took about 1 minute and a half. No big change! I captured frames from the station using Netmon. Can you open a workspace to upload the file to you? Thanks,Doria

OK. For your convenience, I have created a workspace for you. You can upload the information files to the following link. (Please choose "Send Files to Microsoft") Workspace URL: (https://sftasia.one.microsoft.com/choosetransfer.aspx?key=48c0e612-3052-452c-ad93-9901ac066baa) Password: o8I_rSLL@I Note: Due to differences in text formatting with various email clients, the workspace link above may appear to be broken. Please be sure to include all text between '(' and ')' when typing or copying the workspace link into your browser. Meanwhile, please note that files uploaded for more than 72 hours will be deleted automatically. Please ensure to notify me timely after you have uploaded the files. Thank you for your understanding. Best Regards Dale Qiao TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi Dale Qiao, I just uploaded to you 2 (two) files saved from netmon. Please, take a look and try to help me discover why this Windows station, in particularly, takes so long to open a network file wich others opens it almost instantanely... . Ah, the file is an excel spreadsheet called teste.xls I will be looking forward for your next post. Regards, Doria

Hi, From the netmon, I noticed that you enabled IPv6 in Windows Vista, please try disabling IPv6 to see if you can access the network share faster. Please refer to : How to disable certain Internet Protocol version 6 (IPv6) components in Windows Vista, Windows 7 and Windows Server 2008 BTW, please read: A long delay occurs on a computer that is running Windows Vista or Windows Server 2008 when you run an application that uses a UNC path to access a network resource Best Regards Dale Qiao TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. ”

Hi, As this thread has been quiet for a while, we assume that the issue has been resolved. At this time, we will mark it as ‘Answered’ as the previous steps should be helpful for many similar scenarios. If the issue still persists, please feel free to reply this post directly so we will be notified to follow it up. You can also choose to unmark the answer as you wish. BTW, we’d love to hear your feedback about the solution. By sharing your experience you can help other community members facing similar problems. Thanks for your understanding and efforts. Best Regards Dale Qiao TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi Dale Qiao, Sorry, I am late! Just today I could read the articles and make the procedures for labs tests. Right now, our Windows Vista received the following commands: 0. Firewall is off; 1. IPv6 is disabled; 2 Antivirus is disabled; Perhaps, copying files from the network still taking too long; Windows Vista shows up 66.9KB/sec at Windows Explorer. No change! On time, I have captured new network traffic and sent to your workspace area. Please, check for the new files "alvorada_netmon_filtered.v2.cap" and "alvorada_netmon_full.v2.cap". See you on the next post,Doria

1. Doing the same file copy with a command prompt and see if the issue occurs. You can use the following command: Copy \\IPaddress\folder [destination path] 2. Obtain the following hotfixes: Copy process is very slow when you copy large files from one computer to another computer in a high-bandwidth network environment if both computers are running either Windows Vista or Windows Server 2008 When you copy large files between two Windows Vista or Windows Server 2008-based computers in a high bandwidth WAN network environment, the copy speed may be very slow The copy process may stop responding when you try to copy files from a server on a network to a Windows Vista-based computer 3. Verify and test the folowing recommended registry settings on a client before pushing this out to all machines. [HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MRXSmb\Parameters] "InfoCacheLevel"=dword:00000010 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] "NoRemoteRecursiveEvents"=dword:00000001 "NoRemoteChangeNotify"=dword:00000001 "NoRecentDocsNetHood"=dword:00000001 [HKEY_CLASSES_ROOT\*\shellex\PropertySheetHandlers\CryptoSignMenu] "SuppressionPolicy"=dword:00100000 [HKEY_CLASSES_ROOT\*\shellex\PropertySheetHandlers\{3EA48300-8CF6-101B-84FB-666CCB9B CD32}] "SuppressionPolicy"=dword:00100000 [HKEY_CLASSES_ROOT\*\shellex\PropertySheetHandlers\{883373C3-BF89-11D1-BE35-080036B1 1A03}] "SuppressionPolicy"=dword:00100000 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] "StartRunNoHOMEPATH"=dword:00000001 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer\SCAPI] "Flags"=dword:00100c02 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager] "SafeDllSearchMode"=dword:00000001 "SafeProcessSearchMode"=dword:00000001 HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanWorkStation\Parameters Value name: ReadAheadGranularity Data type: DWORD Value Radix: Hexadecimal Value data: 16 HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters Value Name: SizReqBuf Data Type: DWORD Value Radix: Decimal Value: 65535 Best Regards Dale Qiao TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi Dale Qiao, Today, after making your procedures, I decide to make another one; I change the station ethernet port to plug on another switch, and the problem was gone. So, in other words, no Vista fault! Sorry for the mistake. We may close this post now. Thanks again for all the sharing information and help.Doria