Windows XP hangs durring shutdown

I have an issue with the windows XP installation on my laptop. It hangs durring shutdown, yet not all the time. It seems to be completely random. It will close all the programs and get to the login screen and it hangs, not all the time, seems to be random, about 50/50 percent chance. There is no hdd activity, sometimes it wont respond for up to 15 minutes, after wich the hdd will be active for a few seconds and then the machine will shut down.

I have user hiver cleanup service installed as it was suggested that it might help, however this did not help at all, it is realy frustrating me.

Check out Jim Eshelman's site for shutdown/restart problems with XP...

Windows XP Shutdown & Restart Troubleshooting
http://www.aumha.org/win5/a/shtdwnxp.htm

Another good troubleshooting site for shutdown problems is the ElderGeek's site here...

Troubleshooting Windows XP Shutdown Issues
http://www.theeldergeek.com/shutdown_issues_in_xp.htm