Right-click the new filesyscheck.cfg file > Properties > Check "Read-only." This prevents the game from overwriting your custom checksum list when it updates.
You may need to perform a "Repair" installation from the original disk or reinstall the latest official patches (e.g., version 1.7) to ensure all system files are correctly placed . 4. Advanced: Modern Warfare Remastered (H1 Mod) Call Of Duty 4 Modern Warfare Filesyscheck.cfg Free