Hi roses,
Have a look at this MSKB article, "You receive a The product key used to
install Windows is invalid error message":
http://support.microsoft.com/?kbid=326904
Although the article references Service Pack 1, the same applies to Service
Pack 2.
Whomever you purchased the computer (if XP came pre-installed) or XP install
CD from may have sold you a pirated copy of the operating system.
Regards,
--
Patti MacLeod
Microsoft MVP - Windows Shell/User
"roses" <> wrote in message
news

4D27179-389B-4D19-B34E-...
> I have been trying to install the auto upddate for windows xp service
pack2--
> the install fails because it says: cannot install- the Product key used to
> install microsoft windows may not be valid?? it is registered to me?? I
> don't know what to do or how to check this-I'm not a techie either..but I
can
> follow dirrections..can anyone help me please.. thanks.
>
>