Yeah, the consensus seems to be, it's a needle in a haystack chase for solutions and these error codes are just pretty useless.
Am on a laptop, so should I unplug the PC and see if it BSODs on battery power? Not gonna go out and buy a new power adapter just to test this hypothesis.
Was it caused be an ASUS BIOS update around the time the issues arose? Possible. Was it caused by a trackpad replacement I got for my machine during warranty (and possible USB driver errors)? Maybe.
Am trying now a fresh install with a Win ISO over the existing system (so to keep my apps and setting). But not sure if that might be a waste of time as it might or might not reinstall all drivers?
Ideas welcome ¯\_ (ツ)_/