valheim atm has a specificly high demand on power supply spiking so it might be an underlying psu-problem that surfaces because of this. i struggled with psu outages for months with no logs. while i could play most demanding games fine it always tended to shut down pc on subnautica2 specifically i found no logic in it until i read an in depth article about spike voltages. when a psu is not suberb quality it tends to create deviations which triggers built=in hardwired emergency shutdown procedures of cpu/mobo if problem persists try upgrading your psu to a higher grade (not higher voltage but better quality) and ensure optimal airflow, also be careful becaus eif it's this problem you might actually damage your HD/mobo/ram etc if you keep trying.