ASP.NET IIS 7.5 HTTP 500.21 error

Question

I am having an issue setting up a local site.

The project is using ASP.NET Framework 4.0 and I have my DefaultAppPool to use 4.0 with Managed Pipeline Mode as Integrated

Answer 1

Did you register .NET with IIS? If not run the following commands:

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -i
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -i

You need to do this from an elevated command prompt (...run as admin).