Had this problem too, I ended up disabling that sound completely in the sound menu. But I reformatted my comp recently, and it hasn't done it yet, so I'm not sure what caused it. I was on a different video driver tho on my G74
Sager NP9370
256GB Samsung 840 Pro SSD + 750GB 7200RPM Secondary HDD
nVidia GeForce GTX 680M 4GB VRAM
Intel Core i7-3630QM 2.40GHz
16GB RAM
Mouse: MadCatz R.A.T. 7
Keyboard: Razer Lycosa Mirror
Additional Monitors: 24" 1080p Insignia LED/LCD TV and 21" Acer LCD Monitor
Windows 7 Ultimate