[2020] Complete system freeze during gameplay

Your best bet would be to reach out to a local hardware expert for assistance, or to the vendor of the PC if it was purchased pre-built. It sounds like you’ve already tried most of what we would recommend in this situation, but there may be some other ideas here: https://support.fatshark.se/hc/en-us/articles/360038965013--PC-How-to-Resolve-PC-Crashes-Loss-of-Responsiveness-or-Blue-Screens-BSOD-