Windows 10: PC crashes frequently while playing Fortnite, Roblox. Please help!

My young son recently purchased a lower end gaming rig. He only plays Fortnite and Roblox, but even with settings turned down, both crash very frequently, to point it's almost unplayable. I ran a few benchmark tests and showed bottleneck with GPU, so installed a new Nvidia RTX 4060 to replace the onboard gpu. Great benchmark performance now, but still crashing. Please help and thanks in advance!Windows 11Amd ryzen 5 5600g hexacoreNvidia geoforce RTX 406016gb ddr4 3200

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My pc freezes and crashes while playing fortnite

As the tilte suggests i have been experiencing my pc freezing and crashing while i play fortnite (havent tested any other games). To begin with ive been experiencing fortnite crashing mid game for the past week. I updated drivers windows 10 and unistalled fortnite and installed it again. After the windows update i think that the problem expanded to my pc freezing and crashing. To save you some time i have Autoruns from a previous crashing issue

 

My pc freezes and crashes while playing fortnite

also we have shifted our focus on fortnite crashing while my main issue is that my pc crashed while playing fortnite and rebooted 3 times since yesterday

 

PC Crashes, No BSOD when playing fortnite later into a game.

Hello. I play many games and all is fine. The other day out of nowhere when I play fortnite, my pc just turns off goes black and restarts. It crashes about 15min into each game only on fortnite. Ive done a clean install of drivers. My temps and watts are ok. So Im trying to figure out what can be causing this. Help is appreciated. Thank you.