Whenever you sell a computer, don’t simply leave the hard drive with all your data easily recoverable. Ensure you keep the hard drive (HD) as a backup or external drive, wipe it properly so the data can’t be recovered, or destroy it completely with hammers, drills, and other manly stuff. I was on Craigslist earlier searching for a cheap laptop to buy so I can play with Linux. I found a guy looking to sell two laptops for ~$70 simply because his ex-girlfriend changed the log-in passwords. Hard Drives – Keep, wipe, and/or destroy it. But don’t simply give it, and all your information, away for free. Your credit score and mindset will thank you later.