I recently bought a used Surface 3 that was locked with bitlocker and reinstalled Windows 10 on. The machine seems to function fine for the most part, but at times will randomly appear like it has shutdown (the screen goes black, but the windows button still vibrates when touched like its still on). This seems to happen most when something with Wifi or Bluetooth is used (shortly after connecting to wifi). I've tested benchmarking apps like prime95 on it and it seems to operate well under these conditions (so I presume the cpu/ram/ssd is okay). I've also noticed these errors in event viewer and have had no luck finding any solutions to them

Source:

DptfParticipantWirelessService

DptfPolicyCriticalService

DptfPolicyLpmService

DptfPolicyLpmServiceHelper

DptfProcessorParticicpantService

I also updated the Intel Dynamic Platform and Thermal Framework drivers to 8.2.11004.3973 and my wifi driver is 15.68.9120.47

I've also ensured that hibernation is disabled and that prefetch/superfetch are also disabled.

Does anyone have any thoughts of what else could be wrong/where else to look?

Edit: After some more messing around it appears that it may not be linked to the wireless card. I disabled the cameras/usb/wireless/bluetooth in the UEFI and the issue still persists.