I have a Toshiba Satellite laptop. Recentely after booting I received the error message "HKDRV driver is absent". Since then my game stopped working because the sound wouldn't work and I can't play music. I tried reinstalling the sound driver and other drivers and that didn't help. Later I reformatted the hard drive which worked but less than a week later the same error message is back with the same problem. Where do I get this driver? I have checked several driver web sites and none have heard of this driver, neither has microsoft. Any suggestions?