Hello, I've upgraded to Windows 7 from Vista some days ago and I've a strange performance issue during copy of files from Windows 7 to some server on my intranet. If I copy ReadOnly files to a Windows Server 2003 (sp1 or sp2) the copy process is really slow (2Kb/s). If I copy the same files without the ReadOnly attribute it takes less than a second as usual. With Windows Vista on my Pc the same copy process has worked always without problem. The slow copy happens either copyng on a share (\\myserver\dir) or directly accessing the folder using the $ commane (\\myserver\c$\dir). The same files copied on other Os are copied immediately, I tried XP and Vista. This issue happens on 3 pc upgraded from Vista to Win7, two are Win7 Professional, one is Ultimate. If I copy the same files (with readonly attribute) from a virtual xp machine hosted on Windows 7 there is no problem. Can someone help me? Regards, Matteo Conta

Little update: the problem still remains if I copy files using the Command Shell, the removing of the ReadOnly attribute doesn't work. If I use the Explorer and I copy the files with ReandOnly attribute is slow, without it is fast. The problem is still unsolved.

Hi, Based on my research, I would like to suggest the following: 1. Boot the system to Safe Mode with networking and see how it works. 2. Ensure that the NIC driver for Windows 7 is up-to-date. 3. Please run the following command in an elevated command prompt in Windows 7: netsh interface tcp set global rss=disabled netsh interface tcp set global autotuninglevel=disabled netsh int ip set global taskoffload=disabled 4. Disable SNP in Windows Server 2003 by setting Registry as following: Note: Please perform a full-system backup first. [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters] EnableTCPChimney=dword:00000000 EnableTCPA=dword:00000000 EnableRSS=dword:00000000 An update to turn off default SNP features is available for Windows Server 2003-based and Small Business Server 2003-based computers Hope this helps. Thanks.Nicholas Li - MSFT

Thank you for your help, I've checked all your suggestion with no lucky but... at the end of the day, after your suggestions, I tried to stop the Kaspersky Antivirus on the server and... the problem disappeared! I excluded this action in the past days because the problem happened only to win7 new clients and not to other clients, so I excluded server issues... I was wrong.. Thanks for the support, Matteo Conta

Hi, Thank you for sharing the good news! I am glad to know that the issue is resolved after disabling Kaspersky. Your efforts are highly appreciated. This information and what you experienced can be a good reference for the users who meet the similar issues. In the future, if you experience any issues regarding our products or if you have any feedbacks, you are also welcome to post a new thread in our forum. It is always our pleasure to be of assistance. Thanks again. Have a great day!Nicholas Li - MSFT