I've had corrupted files once in a great while, but I Ghost my system partitions frequently. An SCSI HD was going bad once, but I have 2. And I don't install a bunch of stupid apps like a little girl. 2 firewalls. And I clean out the thing and make sure all the fans work.
That'll cure a boatload of the problems with most of these folks. Ghosting is great, isn't it?