A process serving application pool 'Classic .NET AppPool' suffered a fatal communication error with the Windows Process Activation Service

Question

I am running an ASP.NET 3.5 web application on IIS 7 on Windows Server 2008.

I received the following error earlier this afternoon:

HTTP Error 503. The

Answer 1

I had this problem, the event viewer had "The Module DLL C:\Windows\system32\RpcProxy\RpcProxy.dll failed to load. The data is the error." This post had the steps to correct this: http://forums.iis.net/t/1154189.aspx