This guide is to help players who are having issues running the game.

Battle.net

• Try doing a Scan and Repair: Repairing Blizzard Games
  
• Disable any services or applications that may interfere with the game: Closing Background Applications
  

Steam

• Disable any programs that may interfere with Steam.
  
• Verify the integrity of the Game Files.
  

For issues with antivirus software:

• If you are running an antivirus software, we recommend adding the entire Call of Duty: Modern Warfare game folder to your antivirus exception list.
  • For Comodo users: Select Settings → Advanced Protection → Miscellaneous → Detect Shell Code Injections [Exclusion] and add the entire Call of Duty: Modern Warfare game folder to the exclusion list.
  • For BullGuard users: Select Settings → Main and uncheck Self protection.

If issues still persist:

• If you are using Razer Synapse, make sure to update to the latest driver.
• Perform a clean boot and only start up with the bare minimum programs: How to perform a clean boot in Windows
• If the game doesn't start and you have disabled ASLR on Windows, re-enable it.
• Disable NZXT CAM, MSI Afterburner, and Razer Cortex, as these can conflict with Call of Duty: Modern Warfare.

Shader Preloading

Shader Preloading is an important part of the first boot process. You're warned in-game to let the Shader Preloading process complete before starting any game mode. Here's the average Shader Preloading duration across a variety of systems.

This is not enforced, so you can load in-game while the Shaders Preload is still underway, but you'll be warned that this might affect performance.

Once in-game, the following icon will appear if shaders are compiling:

• The icon will be orange in the Main Menu if the download is still ongoing.
• The icon will be orange in-game if the download is still ongoing.
• The icon will turn red in-game if the download is still ongoing and creating performance issues.