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Open your antivirus software (e.g., Windows Defender, Avast, Malwarebytes). Locate the or Quarantine Zone .

Go to Library -> Right-click GTA IV -> Properties -> Installed Files -> Verify integrity of game files .

This comprehensive guide will help you safely recover or replace your launcher executable, fix common startup crashes, and optimize the game for modern hardware. Why is Your GTA IV Launcher.exe Missing or Broken?