PC Hard Crash after roughly 5 minutes of gameplay.

[SnowFoxKai]

The computer in question is my father's.

'Nvidia GeForce GTX 1050 Ti' graphics card
'AMD Ryzen 3 1200 Quad-core' CPU processor.

Logging into the game works perfectly fine and will run without any trouble (No lag and no loading trouble), but eventually the computer will hard-crash (black screen before re-starting to PC login) without warning.
Playing other games (Subnautica and Factorio) work perfectly fine without any such problems, and it can run the 'Wayfarer's Haven' EQ server without this issue.

I have also tried running it as Admin, as well as through compatibility modes with no success.

I don't think it's an issue ISP wise, as both his and my own PC connect through the same router, and my computer doesn't suffer the same issues. (Nvidia GeForce GTX 1060 / Intel Core i7-6700HQ @ 2.60GHz).

I've thought of trying to see if setting up 'DgVooDoo2' or 'WinEQ2' would fix anything, but asking here first to see if there's a more clear fix than trying those as a work-around.