Today I installed VS2010 SP1 Beta, and IIS 7 Express, as I currently have IIS5 on my local development machine and thought I\'d try IIS Express out.
I have gone into the
1- Close Visual Studio.
2- Delete IIS Express folder in Documents or edit applicationhost.config:
applicationhost.config
3- Delete solution file.
4- Start Visual Studio and use open website.
5- Choose your website folder.