I'll begin with I'm computer illiterate. I really need a reply that a computer dummy like myself can understand. I tried googling "How to delete everything on a computer" and it came up with a lot of different ways. I'm not sure which one to follow and most of them weren't helpful to me (They talked about stuff that I did not understand). Basically I want to clear everything so I can sell or give these computers away and not have someone discover whatever info I put on the computers. If I can accomplish that without getting rid of the operating systems I would prefer that. I have 3 computers: Macbook Pro (OS X and Windows 7 64 bit edition on it) Compaq Pesario with Windows Me CyberPower with Windows XP Home edition (This computer has a virus on it and I'm unable to get to the desktop) I believe I only have the OS X disc . Ideally I would prefer the easiest method to get rid of the data because I'm not very knowledgeable about computers. Thanks to anyone who can help me If anyone is curious, I want to get rid of my computers because I am addicted to them.