I found a video on YouTube with the same problem as mine. According to him, he have solved his problem by replacing his on-board sound card.
Try disabling your onboard audio / Realtek audio device in your BIOS and install a different sound card. I know it's a horrible thing to have to do but I've disabled my onboard Realtek and have been using a Creative XiFi PCI Card for a week or so (several 90min sessions), without a problem.
So, I bought a different sound card and have it installed on my PC. But then, the problem still exists.
I really need your help guys.