HTTP Error 500.21 – Internal Server Error

Handler “PageHandlerFactory-Integrated” has a bad module “ManagedPipelineHandler” in its module list

This error message likes to appear when ASP.NET is not installed correctly. To fix it run:

aspnet_regiis.exe -i

form the appropriate framework directory e.g. in C:\Windows\Microsoft.NET\Framework\v4.0.30319

Seems to fix the problem most of the time!

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