HTTP Error 500.19 - Internal Server Error

Question

I'm using Windows 7 and getting the following error. This was not when I was using Windows XP.

Answer 1

Is this application marked as an application?

Also, have you tried running the application in Native mode?

Answer 2

It is likely that this error is due to your application pool running in Integrated mode in IIS 7.

Can you check if it is running in Integrated mode.

If so, try converting the application pool to run in classic mode and see if that helps get rid of this error.

For a better understanding of what Integrated mode in iIS 7 is and why it might be causing issues, you can also read this article here