Weird stuff going on here. I am a tech by trade and this just has me baffled. Im looking for soem feedback on things I might be leaving out. Problem: When hitting the mute button or using the volume dial on my keyboard Windows XP Professional locks up. Things tried: New sound card drivers, new keyboard drivers, new keyboard with different volume controls and mute. All the drivers for the mainboard are up to date. This just started happening one day and it has me absolutely baffled.