One thing i have never understood is why people never make backups (true image, ghost etc) to cover their ass, it is down to the users sheer ignorance that they blindly install garbage that causes tons of problems then {bleep} and moan when things go tits up, that a simple backup could save the day in mere minutes but windows and the users common sense does not mix.
People have been saying "make a backup" for years upon years but falls on deaf ears, but who cares when we can blame microsoft.