Thursday, July 21, 2011

Windows 7 Explorer Hangs Interminably On Network Copy to 2008 R2 Server

Quick Description:  Windows explorer hangs copying large files at “discovering” and never returns when copying from Windows 7 to a Windows 2008 R2 network location.  Attempting to cancel, or close the dialog will switch the dialog to say it is copying with n minutes left, but no progress is actually made.
Solution:  As referenced in KB951037 disabling TCP Chimney Offload instantly solved the problem for me.
From an administrator command prompt type:
netsh int tcp set global chimney=disabled

Update:  This can also a problem with Symantec Enterprise Protection 11.  My feelings about the product notwithstanding, many company domain policies will allow you temporarily kill the service (services.msc) while you perform a specific task.

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3 comments:

  1. I have been dealing with this problem for days and behold SEP 11 was the culprit. I uninstalled SEP on the client side and the problem was gone. I ended up having to build a new install package with just Anti-Virus & Anti-Spyware and the problem is now resolved. Thank you for showing me the path.

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  2. Thanks Caroline,
    SEP11 was the cause here also.

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  3. SEP 11 Caused it here too..thank you.

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