some people reformat once a year just to lose any junk that's on it, and get it running like new again. the easiest way would be to get a disk imaging program, reformat, take an image of the clean windows install, and save it. then go on and load all your programs, my documents folder you saved, etc. next time you want to reformat, you can just reload the fresh install disk image you saved, and should be able to do that in about less than ten minutes.