I commented back in my thread (now removed) that if you have Turbo Fan Mode on, an external monitor connected over Type-C and the lid closed under heavy load (compilation for e.g.) the laptop will turn off by itself. If I turn off the Turbo Mode no issue (but then my compile time is way slower). If I let the lid open it doesn't turn off (turbo mode or not). As I explained in detail in the thread, I had setup the laptop to never sleep when Lid is closed and connected to power). I traced why the laptop would go in sleep mode and the AsusOptimizationService is the culprit sending a shutdown event for no reason. If I turn off this service, I do not have the issue (but then I lose a bunch of functionalities like hotkeys and stuff). I did a detailed analysis and nobody from Asus did seem to care (which is also one of the reasons I will no buy Asus again, this and the numerous bugs). Your Antivirus suggestion doesn't make any sense so does the safemode since AsusOptimization will disabled therefore the issue will not trigger.