I beg to differ, I tried that approach a few years back with my folks, only to discover on my next visit a few months later that they went down to a local PC store and got Windows re-installed.

They never managed to get it working for their liking, it wasn't able to run the stuff their friends used to talk about or share via CD/DVD/USB sticks, and they did not wanted to bother me with "dumb" questions.

So I rather that they have Windows, go down to the local PC store when something isn't working as it should.