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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