Friends today my pc every thing is fine but when i clean my cpu and then restart it show boot not in full screen even i cant play games in full screen.althow my pc works in full screen.but only while game play and taking boot it come in not full screen.i check all resolution my pc but it is in full resulation.i.e 1600*900.why i cant play game full screen .its ram problem or not.i have no gpu.
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