Windows 10: PC crashes/restarts after game loads up. I NEED HELP!

PC crashes/restarts after game loads up. I NEED HELP!I’ve had most parts for about 2 years, all labeled NEW parts are from the last 2-3 weeks. PC has been having this issue. - AMD Ryzen 5800x NEW- Gigabyte x570s motherboard NEW had a x570 gigabyte before. - EVGA 3080ti Ultra FTW - 1000x Corsair PSU NEW had a 850w seasonic before. - 1TB 980 PRO NEW all sectors tested and fine. - 500 GB 970 EVO plus all sectors tested and fine. - VENGEANCE RGB PRO 16GB 2 x 8GB DDR4 DRAM 3600MHz C16 NEW has been mem tested and all is normal. All temps are normal on heavy loads Event viewer shows nothi

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Games installed off Microsoft store crash at loading screen and restarts PC

Any game that I purchase and install from the Microsoft store will start to load but then will crash at the loading screen and restart my PC. Ive followed many of the resets suggested but nothing works. All I want is to be able to play Halo Reach. I had
this same issue with Battlefront 2 a while back and ended up refunding and giving up on it working. I’ve seen another thread with my same issue from 2017 but it has no solutions to the problem. All other games from other stores work perfectly fine on my PC.
Only games from Microsoft store do I get this issue. (Btw I purchased Halo on steam first, the issue occured so I refunded and bought directly from Microsoft store and same issue occurs.)

 

Hard crashes with ANY heavy load

Out of the blue, my computer has been crashing upon heavy loads. For example, playing a game. I can load into the menu fine, but when it finishes loading the game, either the game will crash or my computer will black screen and restart. Specs and what I have tried already are as follows:

• CPU: AMD Ryzen 5 5600G
  
• RAM: 32GB Corsair DDR4-3200MHz
  
• MOBO: ASUS X470 Prime Pro
  
• GPU: ZOTAC GTX-1070
  
• PSU: Corsair CX450
  

What I have tried:

• Updated drivers for CPU, GPU and MOBO BIOS updated
  
• reinstall GPU drivers via NVIDIA software utilities
  
• unplugged and reconnected all PSU connections, reseated GPU
  

I'm out of ideas. Any suggestions you have to fix my issues are greatly appreciated.

 

Pre-loaded games won't uninstall

I'm not really into some of the games that were pre-loaded into my PC but when I try to bring up the games from the Start menu and click on 'uninstall' it takes me to the control panel, and I don't see the games listed there for me to uninstall. Suggestions, please? Thanks! ~P