I had similar problem which was resolved by taking two steps :
1A. DELETE THE REGISTRY KEY : 32-bit machine> [HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionAppCompatFlagsLayers]
1B. DELETE THE REGISTRY KEY : "C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\devenv.exe"=""
2A. GOTO : 32-bit machine> [HKEY_CURRENT_USERSoftwareMicrosoftVisualStudio
2B. DELETE THE FOLDER CONTAINING VISUAL STUDIO VERSION WITH PROBLEM: e.g 11.0 and 11.0_Config