Hi, welcome to TSG.
Get
DBAN, Darik's Boot and Nuke. Download the iso file and burn the image to a CD. Then boot up with it a wipe everything off the hard drive.
From the site:
Quote:
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DBAN is a means of ensuring due diligence in computer recycling, a way of preventing identity theft if you want to sell a computer, and a good way to totally clean a Microsoft Windows installation of viruses and spyware. DBAN prevents or thoroughly hinders all known techniques of hard disk forensic analysis.
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