When I try to run Fortnite, this shows up:

Patched Windows boot loader detected error Fortnite

This happened after I did some changes to the Windows features, but the same thing happens even after I undo everything I changed.

  • Try to locate EasyAntiCheat_Setup.exe in the Fortnite directory

(somewhere like:)

C:\Program Files\Epic Games\Fortnite\Fortnite Game\Binaries\Win64\EasyAntiCheat

  • Click on the executable, accept the UAC (if you have it), and in the EAC window, choose Fortnite and hit repair tool. If this didn't changed a thing, try hit uninstall Easy Anti Cheat, and then reinstall it.

Hope it helps.

  • Fortnite Game should be FortniteGame (no space), at least as of the time of this comment. – Mud Feb 24 at 3:48

This is an issue with EAC (EasyAntiCheat) which Fortnite recently upgraded to, which also seems to detect pirated copies of Windows. Assuming your Windows isn't pirated, some suggestions I found online were:

  1. Restart your computer;
  2. Configure your antivirus to exclude the EAC executable file;
  3. Uninstall your antivirus entirely;
  4. Make sure Windows is up to date;
  5. run the https://www.boyans.net/dual-boot-repair-windows-10.html boot repair tool (some people claim this might be because of a corrupted boot sector).
  6. Contact Fortnite support.

I've also seen claims that clean installing Windows fixes this, but I can understand if you're reluctant to do this.

  • My copy of Windows is pirated :P – MythicalCode_ Jun 13 '18 at 2:45

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