Question : My computer wont shutdown.

I am unable to shut down my pc.  I go to start-shutdown-shutdown.  It goes to the process of shutting down. However it boots back up.  I have xp sp2 but this is happening way after I installed sp2.  No problems with sp2. Any ideas.

Answer : My computer wont shutdown.

Also try to boot into safemode, and from there try to shutdown,,,, does it work from there ??

if yes then in normal mode, Goto Start>Run>msconfig>Startup, and click on Disable All
now goto Services section, and tick Hide Microsoft Services
and now untick all those third party services
restart and now check if the same problem ??
if NO then u can re-enable each application\service at a time to trace out the culprit one !!