Mar 19, 2010
This is why I always make a ghosted image of my pc without exception. But I presume you didn't do that so let's tackle your problem head on.

First of all why do you need to go back? If its virus related it might follow you. If you muffed up the puter you can likely undo it without clicking the proverbial undo button. What OS? If you want to restore and can back all your important documents up first then read on...........

Did they give you the OS installation media? Sometimes they don't anymore.
If they did I would