Hi everyone.. I was playing counterstrike halfway when the game hanged on me and the headphones i was wearing emitted a very sharp, constant, high-pitched sound! What's the possible cause?? my pc specs... cpu : p4 2.8c ghz..running with stock fan mobo: msi 865pe neo 2 series psu : antec truepower 480w sound card : creative ..audigy gfx card : msi fx-5200..(entry level lah) 1 s-ata + 1 p-ata + 1 cd-rom + 1 cd-rw + 1 floppy drive.. It has been happening since I've used xp... happens almost everytime i play cs.. what is the possible cause??? pls advise, thanks..