Yes, and it's usually clean-wipe, or voodoo registry editing. Guess that none is user friendly: the first one, because none of average Joe Users does backups, and the second one, because editing the registry is far from intuitive and documented.
I never had to do that to solve my problems, LOL
From which I can only conclude that you do quite a poor job at maintaining all three of them...
No Windows, Linux and OS X might crash once every few months
When I use Windows, even without an antivirus package, I just somehow manage to not infect it with malware (though the last time when I did it profesionally was in 2008). I still don't know what I did wrong.
Using Windows unprotected is likely your problem
Right, you find your system screwed. One piece of software works but another is broken. And you have no certainty in DLL load order, no LD_LIBRARY_PATH, no chroot, no nothing to prevent the screwup — except maybe a virtual machine which is an overkill most of the time.
I often install over 100 pieces of software on Windows, a lot of it freeware, never any problems
You hate Windows, and are exaggerating things to prove your point