when playing videos on full screen using windows media, VLC and windows media classic it lag so hard. while not in full screen it is smoother but still a bit lag. same goes to streaming videos on youtube.... lag a tiny bit but when in full screen hardcore lag! unwatchable! i have uninstalled all codecs ive installed and install just k lite codec pack which reduce the lag efficiently, before i clean up codecs...... non-full screen also lag hard. after i clean 4,5 codecs pack from my system the non-full screen is watchable. i also tried taking off my graphic card and just use default monitor hole and still the same. how to fix this lag in video playback?