I recently un-installed the .NET framework 2.0 as it was corrupt, then deleted the folder from
C:\Windows\Microsoft.NET\Framework\v2.0.50727.

When using Visual Web Developer in Visual Studio I got a message saying that it could not connect to the local webserver. The reason why is because this WebDev.WebServer.exe resides in the .NET framework folder hence was no longer available.

To avoid this problem, rename the folder, then re-install the framework. If you’ve deleted this already, install VWD express as that will re-install the webserver as a “workaround”