"Cannot find one or more components" Error When Executing Visual Studio Express 2012

Today when I tried to open Visual Studio Express 2012 on my work computer I received the error
 "Cannot find one or more components. Please re-install application". After spending too much time un-installing and re-installing VSE12, searching for .dll's(ATL90.dll had the most Google results), updating the  "c++ redistributable" package, and downloading software(Dependency Walker). Ugh... I final found the fix. I deleted the key
C:\\ProgramFiles(x86)\\MicrosoftVisualStudio11.0\\Common7\\IDE\\WDExpress
from the registry: [HKEY_CURRENT_USER\Software\Microsoft\WindowsNT\CurrentVersion\
AppCompatFlags\Layers]. Many thanks go out to VStamenov for the answer. I'm not really sure of the original cause of the error, the conversation in the forum is saying that add-ins could be the issue but I am not using any. The site is at http://social.msdn.microsoft.com/Forums/en-US/vssetup/thread/d848776a-b00f-4311-ab09-3a8777462968
I hope this helps somebody!