How much RAM does it have? Many HP Pavilion PCs were sold with an inadequate amount of RAM installed, and you may simply need to add another RAM module to get it more responsive.
256Mb should be considered the bare minimum necessary to run Windows XP well, and 512Mb is really an ideal amount to have for most purposes.
Also, what processor is installed in your PC?
Catweazle
Grandad
4,335 posts since Mar 2004
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Is it a stand-alone PC or is it connected to a network?
Catweazle
Grandad
4,335 posts since Mar 2004
Reputation Points: 229
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Start off by making sure that all Windows updates are installed. As a bare minimum, ensure that Service Pack 1 is installed, because that contains 'fixes' for some common startup/shutdown problems.
Then follow the advice and tools suggested in the 'Helping yourself..." sticky in our 'Security' forum section, in case you've picked up any unwanted intruders that are making life difficult for you. Let us know if your problem persists after that please.
Catweazle
Grandad
4,335 posts since Mar 2004
Reputation Points: 229
Solved Threads: 149