Symantec AntiVirus Corporate Edition hanging ASP.Net applications?


Josh Brown

We are currently running Symantec AntiVirus Corporate edition on a Windows
2000 Advanced server with .NET 1.1 framework. We've had all ASP.Net
applications running on this machine hang twice in the last week... I've
also noticed that the realtime virus scanning was running as a service in
the background. Normal ASP websites on this server were not affected. I was
able to restart the .NET applications by killing the aspnet_wp.exe process
from windows Task manager. I've had problems on development machines in the
past running AV software (ie.. virus scanner blocks scripts that use the
File system object, etc.. . causing ASP applications to fail). I suspect
this problem might be along the same lines....although not entirely sure
which direction to head in now

The particular version of Symantec Corporate Anti virus we are running is:

Anybody have ideas or theories about this behaviour with .NET and AV
software in general?


Make sure that your anti-virus isn't scanning any temporary directories that
ASP.NET uses and keep it away from the /bin folders. The scanner might
"touch" the file and make ASP.NET think it has been changed, forcing a
recompile. Then, the AV scanner thinks the file is new so it tries to scan
it again. Around it goes.

John Soulis [MSFT]

Please call Microsoft support (800) 936 5800 and request this hotfix. The
support issue will be free.
821438 FIX: Antivirus Programs May Cause Some Web Applications to Restart
Here is another article to be aware of 312592 PRB: Random Application
Restarts with "Application Is Restarting" Error
I hope this helps.
Thank you,
John Soulis
Microsoft, ASP.NET

This posting is provided "AS IS", with no warranties, and confers no rights.
Use of included script samples are subject to the terms specified at

Josh Brown

Yes... we had a number of possible items causing the problem. This helped
narrow it down even more.

Many Thanks :)


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