Hi,
Welcome to Sysnative!
How have you decided that this is what is causing the problem? dxgkrnl.sys is the driver for Direct X. It might be the problem, but I am not 100% certain of this. If you want to check, you can uninstall your current version of Direct X and see if it changes things. If it doesn't then we can try some other things.
Also, I would like to know about the hardware that your running. Is it an onboard sound card, or one that you installed. Please tell me anything else that you think in important too.
Cheers!