I got this computer from the local college when they got upgrades, but got no disc for it. Its got a small 7gig hd, 128 mb of ram, and is like 88% full. Getting a new computer is not an option at this time.

I need to reformat it, but have never done it before. Is there anywhere that has a list of what needs to be done, etc? Ill post my computer specs if that will help, thanks.