My macbook shut down from itself

hi
after i upgrade to mountain lion my macbook pro shut down from itself when i'm searching or doing somethin (weird proplem)!
idk what's the proplem is it because i opened more than 2 apps (which i think it's a silly proplem if it's in the mountain lion)
or because i connected my iphone 5 wirelessly with my my macbook!
apple needs to fix this proplem, it happens everyday to me!
what do you suggest?

Hi,
Try a hard reset of your iPod:  Press/hold the *home* and *sleep/wake* buttons until the Apple logo appears. 
Hope this helps! 

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