When you are selling or trading up your computer, prepare it for the next owner…
When you are selling your computer, prepare it properly for the next owner. This means wiping all the files, data, and programs which you do not want someone else to access.
The article here does an excellent job of readying your computer for its next owner. However, be aware, that the CIA, NCI, ZZA, NSA, in short, those amazing techie experts that you have seen on TV, they can recover anything but for us humans, the article will do.
PREP YOUR COMPUTER FOR SELLING