My SO's computer has been having an issue for a while now where it will just completely lock up. It becomes entirely unresponsive to any input, or network activity. There's no BSOD, no error logs as far as I can tell, nothing.
Here's what I've tried so far:
* memtest - passed
* moved RAM to other channel - still froze eventually
* tried completely different, known good RAM sticks - still froze eventually
* did an in-place upgrade of Windows 10 - still froze eventually
* did a completely reinstall of Windows 10 - still froze eventually.
There doesn't seem to be any rhyme or reason to when it freezes, so I'm going crazy trying to figure out what's wrong with it. It just seems completely random. It boots right back up fine after a hard reset, and the issue doesn't occur any more or less frequently.