Desktop Freezes Up Randomly

Ever since I reinstalled Windows 8.1 (Accidentally reset RAID 0 settings) I've been getting abnormal freezing on my desktop. Can't click on icons or do anything that's associated with the desktop, but I can still use my task bar and run any program just fine. After a few seconds it unfreezes, and I can use the desktop again like normal - Just happens like every 15 minutes.

I know this isn't a virus because I recently did a clean installation. I even ran Malwarebytes plus a full Kaspersky Virus Scan. Also checked my GPU / CPU Temps and they are at normal ranges. I have latest Beta Drivers (14.4) for AMD as well.

Any idea what it could be causing this?

Thanks in advance!