MSBuild does not contain a value for the “VCTargetsPath” property

Question

I recently installed the Visual Studio 11 Developer Preview to try it out, and now my VS 2010 projects won\'t open. Instead, I get the following error message:

Answer 1

I used C:\Windows\SysWOW64\regedit.exe and went to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\3.5 and in the folder for version 3.5 it had 2.0 listed in the defaulttoolsversion so I modified that to 3.5 and everything works now.