The way I see it, seems like a software error (probably broken drivers). The best way to do it is via a brand new windows installation, then latest nvidia/ CUDA drivers and see what happens.
Good luck on this.
That seems a bit extreme for a system that has no problems running games maxed out, or mining using ccminer.
I'm afraid there's only one way to find out. Get an old HDD and do a clean install. Both Nvidia & Ati/AMD have great issues with their drivers; in the past there used to be a specific tool to uninstall (remove registry entries as well) for the CUDA drivers. Unfortunately I can't remember its name...