IIS Express 7.5 Will not start

So I installed IIS Express 7.5 and when I try to run iisexpress.exe in the C:\Program Files\IIS Express folder I get the following error ......................................................... Starting IIS Express ... HostableWebCore activation failed. Unable to start iisexpress. The data is invalid. For more information about the error, run iisexpress.exe with the tracing switch enabled (/trace:error). .......................................................... Adding trace to it I get: ......................................................... Starting IIS Express ... Failed while trying to preload CLR version v4.0. hr = 8007000d Failed to initalize the W3WP_HOST hr = 8007000d Process Model Shutdown called Failed to start 'HostedWASStart'. Error = 1515136 HostableWebCore activation failed. Unable to start iisexpress. The data is invalid. For more information about the error, run iisexpress.exe with the tracing switch enabled (/trace:error). .......................................................... Tried to fix this on my on by doing some googleing but nothing worked. I also verified that there is a config folder ie.e C:\Documents and Settings\Michael\My Documents\IISExpress\config