Occurs at least when only build tools are installed.

There appears to be some problem with detection, compilers for auto-detected kits seems to be wrong as can be seen in attached screenshots. When manually setting kit with 2010 compiler, it also cannot compile directly, claiming not to find cl.exe.

Qt Creator does output:

“Failed to retrieve MSVC Environment from “C:\Program Files\Microsoft
SDKs\Windows\v7.1\Bin\SetEnv.cmd”:
ERROR: The system was unable to find the specified registry key or value

Manually setting up PATH before starting qtcreator works though.