M-Track Plus - Crackling Sound

I've been experiencing an issue where the sound keeps crackling each time a new process is starting to run in the background. I'm not even talking about any heavy processes but simply going to the start menu or opening a new browser window triggers the issue. The sound would crackle (or skip) for a few seconds and then go back to normal.

I'm 99% sure this is a driver related issue, I'm using windows 8.1 64bit and the only available driver on the m-track plus list was for windows 8 64bit back then, it seemed to work fine for a while until noticing the issue.
Would appreciate any help or suggestions... I'm pretty frustrated. If any further information is required, I'll be happy to elaborate.

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