You say the laptop came with Windows 2000?
But it has Windows XP installed?
Is the sticker for Windows 2000?
If so and you have nothing saying Windows XP, you most likely do not
have a legitimate Windows XP license.
Check this link and see if your Product ID is valid:
http://support.microsoft.com/?kbid=326904
Right click My Computer
Click Properties
The Product ID is under "Registered to"
If your Product ID is invalid, see this link:
http://www3.telus.net/dandemar/invalpk.htm
If you do not have a CD, you may not have a legitimate license of
Windows XP.
--
Jupiter Jones [MVP]
http://www3.telus.net/dandemar/
"tweety358" <> wrote in message
news:4E593208-27BA-4BC2-9B35-...
>I purchased this laptop second hand and it came with windows 2000.I
>have
> trouble updating service packs for windows xp.I can update all other
> updates.
> It always says product key invalid. I went to microsoft to check the
> product
> id# .They said it had a valid security sticker. They also said that
> it had
> select license agreement and software assurance home use program and
> that I
> had to pay a fee for their help.Now the product key # in my computer
> is
> different from the one on the sticker on the bottom of the laptop.
> I gave
> them the # in my computer. I don't have the software cd.thanks for
> your help.