How to Fix Call of Duty: Modern Warfare 3 (2011) Crashes

**Call of Duty: Modern Warfare 3 (2011)** is crashing or closing unexpectedly. Here's how to fix it: 1. Verify game files via your launcher (Steam → Properties → Installed Files → Verify). 2. Update your GPU drivers to the latest version from NVIDIA/AMD. 3. Run the game as Administrator.