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Try another account with Administrator access.
Check for viruses and spyware.
Otherwise follow the Service Pack Installation Checklist:
http://www3.telus.net/dandemar/spackins.htm
--
Jupiter Jones [MVP]
http://www3.telus.net/dandemar/
"freemans5" <> wrote in message
news:74ADA99C-A595-4278-97B6-...
> During the istallation for SP2 on Windows XP, it just shut off the "access
> denied" message popped up. Then, it automatically started uninstalling
> SP2.
> What is the problem?