mera pas pentium D 4 gb ram 3.4 ghz 40 gb hard disk k sath window 7 use kar raha ho..magar window seven 4,5 martba kar chuka ho ...ak do bar run hone k bad windwo seven ak BLUE SCREEN show karta or phr option data ha k ya window repair karen ya normally run karen....normaly pe karta ho to woe BLUE SCREEN ati ha...any one help me please...