Product Key. I have recently purchased a new computer. I am trying to register Windows XP. The

Question

I have recently purchased a new computer. I am trying to register Windows XP. The registration asks for the 25 chracter Product Key. There is a sticker on the tpwer that gives a Product Key but when I use this number, I get a message that says the number is incorrect.

WEhere do I find the correct Product Key?