A few weeks ago I installed a little bit more older Realtek High Definition Driver because my microphone wasn't working correctly with the new one and I wanted to play BFBC2 so I played a 2 games and In the middle of the 3rd game everything stopped and some disturbing sound came up and I couldn't minimize the game nor ctr+alt+delete and I am forced to reboot my PC and it always happens not a time that it didn't happen reinstalled the game reistalled the driver and nothing still hapening..