How do I change my "product key" for windows XP? ?

Question

I have gotten an invalid product key message on my windows XP-Pro. The software came with the computer, but is invalid, the company is out of business and I don;t have proof of purchase. I have a valid product key from an old PC no longer in service. How can I put the valid key on my current XP-pro machine with the invalid windows XP?

Answer 1

You got ripped off and may be case for a small claims lawsuit against the former owners.

It seems the version of windows you were given was bootlegged and under false pretenses that you were getting a legit version.

The key from another will probably not work, because M$ reseeds their keys constantly.

I suggest suing for a copy of OEM windows on ebay...

Answer 2

You need to reinstall XP and enter the key when prompted.