Windows XP: http://youtu.be/hKVQ58NpqR8
Windows 8: http://youtu.be/uJ6_aB7lO5U
Reformatting is when you wipe everything off your computer and start again. It can be used to get rid of viruses, or just to speed your computer up again, just as it was when you first got it.
YOU NEED THE XP DISC IN THROUGHOUT THIS TUTORIAL
I recommend only trying this out if you have nothing to lose, and I don’t want to be held responsible for any problems that may arise. It’s not my problem if you wipe your…