Looks like MSVS 11.0 Beta spoiled a MSVS 10.0 installation

Question

I ran into compilation problems with my MSVS 10 after installing MSVS 11Beta. Now, when I compile my C# Projects in MSVS 10 (Projects created in MSVS 10; Target framework: 3.5),

Answer 1

There is an ugly way to fix the problem: renaming folder "C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A". I hate to accept this answer.