Protip: not buying an overpriced Apple desktop also lessens the likelihood of it being 'borrowed'.

Also, don't be an idiot and make two backups sticking them right next to each other.  At the very least, take the effort to move one of them somewhere, even if it's into a cupboard.  So that if your computer explodes, there's less chance of it destroying your second copy.

Otherwise, this guy got really lucky.