Qt Creator faulty kits - can't remove them

Question

I have installed Qt Creator on Windows XP and it has several kits in it:

Desktop Qt 4.8.7 MSVC2008 32bit
Desktop Qt 4.8.7 MSVC2010 32bit
Desktop Qt 4.8.7 MSVC2010 64bit
Desktop Qt 4.8.7 MinGW44 32bit(default)
Desktop Qt 4.8.7 MinGW482 32bit
Desktop Qt 5.4.2 MinGW 32bit2
Desktop Qt 5.5.0 MinGW 32bit

The MSVC ones lack a compiler set, so they have a red annotation mark next to them. However, I only want to use the 4.8.7 MinGW ones, so I don't really need MSVC. However, even if I set Desktop Qt 4.8.7 MinGW44 32bit as default, when trying to build, I get an error Qt Creator needs a compiler set up to build. Configure a compiler in the kit options. The Remove button is greyed out, so I can't get rid of the faulty MSVC kits and I can't build while they're here. What can I do?

Answer 1

Remove MSVC modules using MaintenanceTool.exe.