Ok ever since I upgraded to Win10 I have had an issue with PrecisionX and XOC.
Any version of Precision will just randomly turn itself off. Doesn't matter if I'm gaming or just idle at desktop. 
This is causing my 980 fan to sit at idle speed. I have searched and find nothing to fix this and most of the time I have to restart my PC since just turning Precision back on doesnt allow it come back on. I had the same problem with Afterburner.
Also I had this problem on my old PC then a few months ago I built a new PC and well still same problem.
 
Any ideas to stop this?
 
Specs:
ASUS Z270
i5-7600K
16gb Patriot Viper
Samsung 850 EVO SSD 250gb
Windows 10 Pro Retail

Oh sorry about that. 
No I dont overclock. Everything is stock
Also I forgot to add in my current specs its a ref 980.
 
This did this on my old PC also. only 2 things that have stayed the same between the 2 is Win10 and the current 980. Did a fresh install on the newest build and still does it. Also contacted Microsoft support and they couldnt correct it either. Seems like the first time Precision shuts itself off is if I have had my PC running for 2-3 days.
 
EDIT:
Never had this issue until I upgraded to Win10

Ok tried it and I get this popup from Task Scheduler:
 
An error has occurred for task EVGAPrecisionX. Error message:One or more of the specified arguments are not valid.
 
Does not let me exit from scheduler unless I have that box checked.
In settings tab 

Well, I would uninstall Precision..Then restart your PC..Then delete the Precision leftover files and folder in the Windows Program files (x86) folder..Then go back into Task Scheduler and right-click EVGAPrecisionX and delete the task..Then install Precision again..Then open the Settings and enable 'Start With OS'..Then close and open Precision again..Then go back into Task Scheduler and see if you can uncheck that setting.
 
Or you could just try deleteting EVGAPrecisionX from Task Scheduler..Enable 'Start With OS' in Precision..Then close Precision again so it gets added back to the Task Scheduler Library again and try it.

I'd download it again just to be sure
 
Run a Full Malware anti-virus scan on your PC next
 
You should use DDU - Safe Mode with reboot --> and do a fresh install of your Nvidia driver - just to cover that base - Custom install ONLY the GPU driver & PhysX.
    Make sure your Offline and stop ALL background programs - even security software --> Before installing Either Nvidia drivers or XOC-
    (that is why off line, besides Windows can "mess with installs" trying to "update" while you're installing). 
 
Then after install of Nvidia driver - install XOC & reboot again --> Before opening Precision XOC. 
 
After you reboot log on to Windows --> then connect your internet / enable WiFi
 
My Win 7 Pro 64b & Win 10 Pro 64b will allow around 7 - 10 days of XOC running 24x7 before it will crash --> "could be" a memory leak issue - don't know --> I've learned to shut XOC down and restart once a week.  These machines run up to 60 days between reboot.
 
Nibbler in my signature runs Win 10 Pro with XOC & Rig #2 in my signature Runs Win 10 Pro & MSI Afterburner

I did what Bob said and just deleted it task scheduler and so far so good ,gonna let it go for day or so and see if its fixed then if not Im doing every single thing suggested this weekend when I have time.

Issue has been fixed.
Thank you everyone for helping

now that you got it fixed -- expect a new update  :-)