Why is does the pc not switch off

It may be installing windows updates. To test this, you could temporarily disable windows updates, and see if that solves it.

If not, go to the event viewer, and see if it's logging errors.
start-->run-->eventvwr.msc-->look in the application and system logs for errors (red X's)
 

rishalshetty

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Mar 15, 2011
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yeah found errors wat to do further do u knw..plz