Hey ,
Could you also please report which of these registry keys you have, and what the associated InstallDir is:
- HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\12.0
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\12.0
- HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\WDExpress\12.0
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WDExpress\12.0
And also the InstallationFolder from these keys:
- HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\Windows\v8.1
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.1
And finally all of the above but under HKEY_CURRENT_USER instead.
It sounds like UBT is finding an unexpected VC, or not finding one at all. With this information, we should be more capable of diagnosing your problem.
Steve