Suddenly, my Visual Studio 2010 crashes every time I open any of my solutions (all C++). I can't pin this on the Qt installation for sure, but there's nothing else unusual I changed.
Nothing I tried so far has solved this for me (delete sdf+ilk files, delete suo file, disable all extensions, unload add-ins, run in safe mode).
I originally planned to use the newer Qt versions in Studio, so I installed the 5.3.2 and 4.8.6 for Studio 2010, but I have uninstalled them since.
Edit:
Seems to work after a reboot. That was scary.