Calling LoadLibraryEx on ISAPI filter failed

We have an old application to support, and I installed .Net 1.1 framework on a 2008 r2 server.

After 1.1 framework install, all the other applications on the web server started failing with

Calling LoadLibraryEx on ISAPI filter c:\windows\..... failed

 Fix is to make sure that your aspnet_isapi dll is pointing to the correct path.

On your web server, right click on default web site, and double click on ISAPI filters.

Make sure that the path is correct. On my side, it was pointing to 32 bit framework instead of 64 bit