After last big update. MW crash aleatory to desktop. For me the solution is just after start the game from Blizzard launcher. Close the Blizzard launcher. After that 0 crashes. I write that because i try every option and see the CPU load, Memory etc, and doesn’t work. (Also doesn’t undertand why to touch system config when has been working fine during 4 months). Just try this before doing other things, no waste of time.
What worked for me was to install older nvidia drivers – Jan 2020.