No, I'm not talking about your car or house keys. There are lots of things about your computer that no one tells you. Like when your hard drive crashes you will most like need some information on the bottom of your laptop. I'm referring to the Windows License Key, one of Microsoft's methods to prevent piracy. I have had several laptops come in lately and the Window License Key is worn off. The sticker used to be almost invincible, but not anymore. And when you need to reinstall Windows you need that key. My suggestion is that you either write down the 25 character key, or walk your laptop to the copier and make a copy. This isn't near the problem on stationary computers, the label doesn't tend to fade. Take a minute and do it now.
Here are a few examples of what Microsoft refers to as a CD Key, Product ID, Certificate of Authenticity, and License Key.