YOU KNOW THE TYPE, and you know what they're going to say almost immediately after they start talking. There's something wrong with their computer, and they haven't installed any third-party software or flying sheep screen savers. They haven't been clicking on any email attachments, either; they swear. No, of course not. They were just innocently typing away when, all of the sudden, out of nowhere, something went very wrong with their Windows installation. To make matters worse, you're the one who has to fix it.
Maybe it was all an honest, careless mistake. Heck, maybe it wasn't the user's fault at all. Either way, it's going to take you some time to figure out just what happened and how to fix it. But what if you could simply hit the reset button and have all your troubles melt away? What if you could bring that system back up within seconds, to the same state it was in when the user first booted the machine that morning, and be done with it? Just how cool would that be?