XP will not shutdown

I have a strange problem,I cannot closedown XP!
I have tried the usual way of start>turn off computer>turn off ,but nothing happens.Standby works but not turn off or restasrt.Any ideas?

  hugh-265156 09:06 14 Aug 03

have a look click here and click here;308029

  hugh-265156 09:07 14 Aug 03

oops sorry click here

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