On Visual Studio 2010 + IIS Express 7 I was able to use IIS Express as a server and browse sites.
I\'ve since installed Visual Studio 2012 (on Windows 7 64-bit) with
I had a similar issue running my asp.net MVC4 project on localhost under IIS express 8.0 so I ended up uninstalling IIS 8.0 and installing IIS express 7.5 and straight away the problem was fixed:
IIS Express 8.0 seems to be installed with VS 2012 so if you had a new install or possibly a service pack update this might have upgraded your previous IIS express version.