How to change Windows XP product key

I installed windows with an incorrect product key. The installation with the incorrect product key  has 1 day to be activated.  I have a new valid product key that I would like to substitute for the invalid one.

How can I change my product key in windows xp?
wademiAsked:
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dmwynneCommented:
When you try to activate windows it will give you the chance to change it.

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Majo2469Commented:
In Windows XP this can be done simply with a registry fix. Here is a link with detailed instructions that work: http://pcsupport.about.com/od/productkeysactivation/ht/changexpkey.htm  Good Luck!
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