Black screen while starting.

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venom0706

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Aug 18, 2012
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I have a PC and sometimes when i load Windows 7(Ultimate) and the very start(while loading) the screen goes black and it just freezes.Sometimes it happens several times when i restart it.Usually after the 2nd ot 3rd the problem solves and it loads normally.Any ideas?Somebody told me that this is related to some problem with the electricity power source(not enough Watts).
 
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