Ubuntu 12.04 doesn't shut down anymore

[Dennis Linux]

Hello,

The laptop is 1 month old and there is a installation of Ubuntu 12.04 and Windows 7.
Mostely Ubuntu is used and there were no problems until after a update yesterday.
I saw it on a pc with 11.10 and it's back now, what is wrong that Ubuntu can't shut down.
Unbeliveble that shut down stays a problem!
What update did was the problem in Ubuntu and shut down problems?

Kind regards, Dennis
 		 	   		  
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