Here’s another little freeware that lets you find your computer’s keys….just in case you lost them.
geProduct Key Finder will help you find your Microsoft Office and Windows keys, plus the keys from some third party software.

So far, it found me only 7 of my keys and i wish it would have displayed my Adobe keys as well.

Anyway, if you need to find your other keys, run Belarc Advisor.

A little reminder:

If you decide to reinstall your Windows Xp, make sure that you backup your keys first.