I wasn't too sure which forum to post this, so I apologize if you preferred it elsewhere.
My 13 year old son's PC has a nasty habit of shutting down with no warning and often with no dump file to view. I've run Who Crashed and it lists 5 dump file crashes, but the last one was in June. However, his PC shut down about 6 times today alone and it happens several times every day.
When I reboot the system, the PC acts as if nothing happened. There is no warning about unexpected shut down, check, hang up, or anything usually resulting from a BSOD. Oh, there is never an apparent BSOD. It's an instantaneous shutdown.
I suspected it might be thermal because he was running hot. I put his PC in a place with better air flow, near an AC, cleaned out the dust and the dust filters, confirmed his fans are working. While at heavy load his core temp was hitting 85 degrees Celsius, it idles at about 35 degrees Celsius and typically runs in the 45-60 range. The PC has shut down at temps in the low 30 degree Celsius range, so it doesn't appear to be thermal related. Although, it's clear he needs a better cooling solution.
Who Crashed referenced a problematic driver cfrmd.sys Safe Deletion File. It's related to Comodo. I deleted that and it had no effect on the problem.
I attempted to upgrade his video driver, but it kept shutting down during the process. As a result, there was no driver. I was able to load it through the Properties in Device Manager, but it loaded an older driver. I attempted to upgrade it twice more, but for some reason it stopped in the middle of the upgrade with a notification that it could not upgrade the driver.
He does have a very poor internet download habit, so I suspect it might be malware. Malwarebytes found and cleaned 17 items and Comodo antivirus found none. The problem persists.
I'm leaning towards driver issues, but I don't know.
Also, his Movie Studio Platinum stops working as soon as he loads the program. This is why I'm thinking driver issue, but I'm stumped.
I have a Hijack This log, but won't post it unless requested.
AMD FX-4200 Quad-Core 3.30 GHz
GeForce 610GT 1GB (he has an upgrade to a Radeon R7 260X OC 2GB that I will install after I confirm there are no other issues)
Thanks for you assistance.