HTTP Error 500.21 - Internal Server Error - Simple Solution

HTTP Error 500.21 - Internal Server Error Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module list.

If you getting above error after publishing your asp.net application in IIS 7 then following is the simplest solution for you.

  • Go to command prompt.
  • Navigate to C:\Windows\Microsoft.NET\Framework\v4.0.30319 path.
  • Then type aspnet_regiis.exe -i and hit enter.
  • If you got message like "Asp.net installed suuccessfully" then you have done it then.
  • Remember you must have administrator rights to do the above procedure.


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