hello everyone...i have this weird problem with my compaq laptop vista home premium sp1...this is the problem sometimes the sound is not playing like if you view videos in youtube, watch movies using media player or vlc and also if i play songs in my windows media player it says file not supported or it cannot be played so what i am doing is restarting my laptop and after restarting it everything will work again and after a while it will act different again...sometimes i notice that if i close my internet explorer songs can be played under windows media player...i just dont know hpw to deal with it...by the way my sound card is IDT HD SOUND...hope you can help me thanks