Microsoft will have to give you a new product key. If you tell Microsoft you changed a part on it, they will give you a new product key.
How Do I Generate A Lost Product Key For Windows Xp Pro?
There are plenty of product keys that you can find on the web for windows xp.Search it on Google or yahoo or try the following one:
Qw4hd - dqcrg - hm64m - 6gjrk - 8k83t.
Qw4hd - dqcrg - hm64m - 6gjrk - 8k83t.
You will have to purchase another thru microsoft. Or, google the words retrieve product key. Several sites offer free advice, and key finders. The key is in your registry and very hard to locate. Check with techguys.com