System wont shut down or restart

[Shane]

Hi,

I formated and re-instaled Xp a few days ago and it was fine.

But it wont shutdown or restart now

I click on the shutdown and it does nothing...Same with Restart botton in xp.
However the Stand By and Hibernate bottons work.

So i either have to put it in Hibernation or force shutdown by me turning it off by the switch which isnt good i know

Whats up?

 

[Vista]

Check the following link :
http://www.aumha.org/win5/a/shtdwnxp.php