[pixl97]

>But it runs entirely stable on a parallel Ubuntu installation with the same hardware.

This mostly means nothing because the hardware drivers between the 2 OSs are totally different.

For example you could have bad memory and Linux isn't sticking anything important there, whereas Windows is. Same with things like video drivers and storage drivers.

As someone that's salvaged a lot of old machines, sometimes some particular hardware is bad in a particular OS and replacing it with a non broken card of the same kind fixes the issue.