Go to Windows Security > Device Security > Core Isolation and ensure "Memory Integrity" is toggled on (though some older versions of EAC may require this to be off; check your game's specific support page).
Open and go to the directory where your game is installed (usually under Program Files (x86)\Steam\steamapps\common or Epic Games ). Search for a folder named EasyAntiCheat . Easy Anti-cheat Download Windows 11