turn off problem

[johnny s.]

I have a toshiba satellite laptop with windows xp, I have installed norton antivirus. but after installing some programs, when I try to turn off the computer the system halts, and I have to turn off manually by pressing the power button until it is off.

if someone knows how to fix this problem please help me.

thanks

[merlin_2]

what is running  in the task manager when you switch off? ctrl alt del?have a look is maybe norton?