Critical system failure

[Affinity]

the linked video isn't me, but it describes my initial symptom the exact.

Reason I said 'initial' is because when this happens and I shut off the system the computer won't turn off the fans and lights in my case and I have to force shut down.

This issue of mine happens only with one scenario that is 'having my brand new Cintiq Companion 2 tethered to my PC.'

When this happens there are two ways this happens.

1. I'm working with the device tethered and it just happens no specific time appearance. (high chance of failure happening)

2. I plug the device off while it was tethered (100% reoccurring)

If anybody could pinpoint what the cause of this symptom is it will be a life savior for me.

System -

i7 4790k

reference gtx 980 X2

ASUS x79 Deluxe

CM V850 PSU

4gb of old Samsung ddr3 x4

windows 10