Hi.
Certain games on my machine after a few seconds or a certain event freeze then crash to desktop(Battletech, War Thunder sometimes the game is still running in the backround afterwards with the game's mouse pointer still visible and sound still playing. Other titles like Homeworld Remastered and Starcraft II ran great even on max settings. I have reinstalled drivers and windows many times as well as going to older OS's and OS versions and drivers with no success. Problem doesn't seem to change because of OC settings( i don't OC in general but gave it a shot anyway).
Check your firewall / antivirus, maybe blocking some games.
That doesn't work
I have does far determined that the only games and apps that crash are the ones that use DirectX 11. Ones running OpenGL, Vulkan, DirectX 9, DirectX10, Directx12 don't
Hmm. Question: It may not be your game, but Fortnite has the option for both Direct X 11 and Direct X 12. Would you be willing to test it and see if it crashes on you in either version? I'm having that problem myself.
What graphics card, that might help someone to offer further suggestions.
I use an Sapphire RX 570 8GB GPU.
If you overclocked something, for example RAM, try resetting the RAM settings or resetting the BIOS settings at the very least. When the game crashes, look in the event log (the application or system what error occurred after the departure, there should be the same time.) Perhaps one of the memory chips is either RAM or on the video card is buggy, first reset the BIOS settings, play will not help find the instructions for your motherboard and pull out one of the RAM strips, only the one you need, if you have 2 RAM strips leave one (the second one from the processor should remain the second connector from the processor) try to play if it crashes, change the RAM, put another bar in place of this one, in general, you need to find the culprit of this problem (considering that you reinstalled the system, then the problem is in the hardware itself, so you need to check.