If you have tried all these steps and the error persists, please check if you have installed custom maps or mods (common in the Zombies community). A poorly scripted custom map is a frequent cause of unhandled exceptions. To test this, move the mods folder out of the game directory temporarily to see if the vanilla game runs.

(if mods/maps cause memory overflow).

Force the game to run in an environment it recognizes.

Corrupted game assets or outdated system software can also trigger this exception.