"Unable to load Jit Compiler: (mscorjit.dll): File may be missing or corrupt.

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After installed to various security updates for windows 2003 non of the SharePoint sites are loading, central admin site is also not loading.
We are getting error "Unable to load Jit Compiler: (mscorjit.dll): File may be missing or corrupt. Please check or rerun setup.
"

While running aspnet_regiis –i we got error

 

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We found  .Net 4.0 installed we removed .Net 4.0.

Uninstalled .Net 2.0 and reinstalled .Net 2.0

• Then on web we added iSAP  for v2 C:\WINDOWS\Microsoft.NET\Framework64\v2.0.50727\aspnet_filter.dll

 

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