Problems with Windows update always prompting to restart

Hello. My computer is running win xp home. For some strange reason I
keep getting an automatic update message telling me that "Updating your
computer is almost complete. You must restart your computer for the
upgrades to take effect. Do you want to restart your computer now?"

After a restart, Windows prompts to restart again. It prompts to do
this about every five minutes. Like I mentioned, even if you click
"restart" on the popup window, and it restarts, five minutes after
log-on, the window comes up again. it sucks. like windows.

any help is appreciated.

Thanks
Ken Goodman