Like I mentioned earlier, the graphic card is not on the PC anymore but it restarts again.
Event ID 41: the system has rebooted without cleanly shutting down first.
Windows frequently spontaneously reboots. The only message appearing in the logs is
Log Name: System
Source: Kernel-Power
Date: 10/5/2020 12:51:23 PM
Event ID: 41
Task Category: (63)
Level: Critical
Keywords: (70368744177664),(2)
User: SYSTEM
Computer:
EventData
BugcheckCode 0
BugcheckParameter1 0x0
BugcheckParameter2 0x0
BugcheckParameter3 0x0
BugcheckParameter4 0x0
SleepInProgress 0
PowerButtonTimestamp 0
BootAppStatus 0
Checkpoint 0
ConnectedStandbyInProgress false
SystemSleepTransitionsToOn 0
CsEntryScenarioInstanceId 0
BugcheckInfoFromEFI false
CheckpointStatus 0
CsEntryScenarioInstanceIdV2 0
LongPowerButtonPressDetected false