If you are getting the following error message when attempting to update to SP1:
Error Message: The Product Key Used to Install Windows Is Invalid
http://support.microsoft.com/default.aspx?scid=kb;en-us;326904&Product=winxp
You'll have to purchase a new "Full Version" of Windows XP Professional
and perform a "Repair Install" using the new Windows XP Pro CD and Product Key
that comes with it. (You cannot simply change the Product Key)
How to Perform a Windows XP Repair Install
http://www.michaelstevenstech.com/XPrepairinstall.htm
--
Carey Frisch
Microsoft MVP
Windows XP - Shell/User
Be Smart! Protect your PC!
http://www.microsoft.com/security/protect/
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| i have tried to update Windows XP Service pack1, but it
| will not let me finish---says I need a Product Key.
| Where do I find this????
| What can I do????