Bonnie, this is not related to Windows Update issues.
You cannot install WinXP Home over WinXP Pro.
TaurArian [MVP] 2005-2008 - Update Services
How to ask a question: http://support.microsoft.com/kb/555375
Computer Maintenance: Acronis / Diskeeper / Paragon / Raxco
"Bonnie" <Bonnie@discussions.microsoft.com> wrote in message
| My Computor was taken to a shop to be fixed. I had windows xp home edition on
| it and when it came back fixed it had xp professional on it . I didn't take
| much notice because it was up and working . I can't get any upgrades to my
| computor because it is saying it is not a validated licence . Can I reinstall
| xp home editionwhich is a validated copy which was originally on my computor
| without having to reinstall all of my other programs