Just installed on a new computer this week. My first few ten minutes test ran great but for some reason now after a few minutes I loose sound. I still here the beeps from the ELS when turning my lights on but no sound other than that. I do have a legal copy, run as admin, Windows 7 Ultimate, GTA IV, LCPDFR 1.0, ELS, Trainer, 2 added cars, no other mods.