The one on the sticker was another product key that my dad could use if he reinstalls, but since the one on the sticker is now used and I got the original code that Toshiba used to activate Windows XP on my dad's laptop at the factory, I can give him the original product key and then he can reinstall, if he needs to. But he had his laptop for 6-7 months and it's running with no problems at all.

The product key that was detected by Jellybean was definitely different from the one on the sticker.