I've got a problem with my Windows 7 serial number... It got scratched and blurred off of the back of my netbook due to use :/. I've tried several different key finders, and they've all given me the same key as a result, but the key they've given me doesn't match what's left of the key on the bottom.
(As far as I know, the key on the bottom is located on the lower left part of the sticker, under the serial bar. Most of the sticker has lost its text, but that's where the product key was located on my Windows XP. The ten characters still left are clear enough as to realize they're not the same as the one the programs give me).
Should I trust the programs? I really need the key to reinstall the OS (as there are lots of other problems with the machine too :\).
Thank you (very much) in advance...