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Help with Server Application Unavailable

I have a Windows 2003 std. web server that has been giving this error since it was patched. patches that were loaded were .net 2.0 sp2 and the .net 4.0 was loaded as well. There were possibly some other Windows security and/or critical patches loaded, but I have not verified that yet.

IIS config:
2 websites with seperate IP's and headers
2 AppPools
Both websites's asp.net property tab shows to use version - 2.0.50727


When I try to access either website I get the "Server Application Unavailable" and an entry in the Application event log
Event ID: 1155
Source: ASP.NET 2.0.50727.0
Category:None
User:N/A
Description: Failed to queue the request to the worker thread pool. Error code = 0x80070006 The handle is invalid.

What I have attempted:
aspnet_regiis -i - NO Effect

aspnet_regiis -r - NO Effect

aspnet_regiis -ua
aspnet_regiis -i - NO Effect

Backup IIS Config and reload IIS and ASP - NO Effect

What else is there to do to troubleshoot this? Does anyone have a fix for this?
Sep 7 '10 #1
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