Why do I get the error “-IRQL_not_less_or_equal” when starting Fortnite?

This issue is often fixed by verifying the integrity of your Fortnite game files. To verify game files on the Epic Game Launcher:

  1. Open the Epic Games Launcher.
  2. Find the game in your Epic Games Library.
  3. Click the three dots on the right side of the game line.
  4. Select Manage.
  5. Click the Verify button.
  6. Wait for validation to complete.
    It may take a while to verify all your files.
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