I've owned an Omen 875-0064 for about a month now, and I'm starting to get a problem in the last couple of days with the machine spontaneously resetting itself while I'm using it. It tends to happen about 15-20 minutes into a game.
There's nothing in the Windows event log apart from a notification about the machine not being shut down properly. The BIOS system tests aren't throwing up anything spurious and I've not installed anything new or done any updates in the last few days.
The only thing I can think of is that it's temperature or power supply-related. Both the CPU and GPU seem to be hovering in the high 80s when I'm playing, and the resets only seem to be happening under high load. The machine is on a desktop though in a well-ventilated room and with plenty of clear space around the machine itself, so I've done about as much as I can to encourage good airflow.
Most games allow you to change the graphics settings. Using a lower graphic quality often improves FPS.
Close any applications or programs that are not being used.
Turn on Game Mode. Game Mode is a new feature in Windows 10 Creators Update that improves gaming performance by limiting background processes and programs from using system resources while a game is running.
I tried pretty much everything for this, and ended up doing a factory restore using a USB key, which seemed to solve it temporarily, until I started getting the KMODE_EXCEPTION_NOT_HANDLED BSODs. I suspect it's the same root cause as the resets.
Restored from USB yet again and prevented KB4556799 from installing and it seems to have been stable since then...