Fall Guys Easy Anti-Cheat (EAC) Error: How to Fix It

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Fall Guys’ “Easy Anti-Cheat not installed” error is an EAC installation problem, not a broken game or account — the anti-cheat component either failed to install with administrator rights or was blocked by security software. Fall Guys runs the Epic Online Services build of Easy Anti-Cheat on both Steam and the Epic Games Store, and it installs EAC on the first launch after each update, so a denied permission or a stale install is almost always the cause.

Fall Guys Easy Anti-Cheat (EAC) Error: How to Fix It

This covers the most common Fall Guys EAC failures — “Easy Anti-Cheat not installed,” launch crashes, and EAC error codes — in the order most likely to fix them.

1. Repair Easy Anti-Cheat from the Fall Guys folder

Start here. It reinstalls the EAC service cleanly without touching your game files or progress.

  1. Fully close Fall Guys and your launcher (Steam or Epic Games Launcher).
  2. Open Fall Guys’ install folder and go into the EasyAntiCheat subfolder.
    • Steam default: ...\steamapps\common\Fall Guys\EasyAntiCheat
  3. Right-click EasyAntiCheat_EOS_Setup.exe → Run as administrator.
  4. Choose Repair (Fall Guys uses the EOS/Epic Online Services build).
  5. Relaunch Fall Guys and accept the EAC install prompt if it appears.

2. Let the first-launch EAC prompt through as administrator

EAC installs itself on the first launch after an update, but it needs admin rights. If you clicked “No” on the Windows prompt, or your account isn’t elevated, the install silently fails.

  1. Close the launcher and Fall Guys completely.
  2. Right-click your launcher → Run as administrator.
  3. Launch Fall Guys from the client and click Yes when the Easy Anti-Cheat install prompt from Windows appears.

3. Force the EAC install from Run (Steam)

If the repair option won’t stick, trigger a fresh install directly. Adjust the path to your actual Fall Guys install location.

  1. Press Win + R.
  2. Paste the setup path with the install argument, for example: "C:\Program Files (x86)\Steam\steamapps\common\Fall Guys\EasyAntiCheat\EasyAntiCheat_EOS_Setup.exe" install prod-fn
  3. Press Enter and approve the admin prompt.
  4. Relaunch Fall Guys.

4. Check antivirus and firewall blocks

EAC’s kernel-level hooks are a common false-positive target for security software, which can delete the installer or block the service.

  1. Check your antivirus quarantine for anything named EasyAntiCheat and restore it.
  2. Add the Fall Guys install folder and its EasyAntiCheat subfolder as exclusions.
  3. Confirm your firewall allows FallGuys_client.exe and the EAC service through.

5. Confirm the Easy Anti-Cheat service is running

  1. Press Win + R, type services.msc, press Enter.
  2. Find EasyAntiCheat (or EasyAntiCheat_EOS).
  3. Right-click → Properties → set Startup type to Manual, then Start it if stopped.
  4. Reboot and relaunch Fall Guys.

6. Install Fall Guys on your Windows drive

EAC can fail to register when the game lives on a secondary drive with restrictive permissions. If nothing above works, moving or reinstalling Fall Guys to the same drive as Windows (usually C:) often clears stubborn “not installed” errors.

7. Verify game files and check Memory Integrity

  1. Steam: right-click Fall Guys → Properties → Installed Files → Verify integrity of game files. Epic: click the three dots on Fall Guys → Manage → Verify.
  2. Check Memory Integrity (Core Isolation) under Windows Security → Device Security — a conflict with EAC’s driver can block launch on some systems. Toggle it off, reboot, and test if you’re still stuck.

Fall Guys’ EAC error is an install-and-permission problem, not a broken game. Repair EAC from the game folder, let the first-launch prompt through as administrator, and clear any antivirus block — the repair in step 1 handles the large majority of cases.

Frequently asked questions

Why does Fall Guys say 'Easy Anti-Cheat not installed'?

Fall Guys installs EAC on first launch after each update, and that step needs administrator permission — if it's denied, blocked by antivirus, or the installer is missing, you get 'Easy Anti-Cheat not installed.' Running the game's EasyAntiCheat_EOS_Setup.exe as administrator and choosing repair fixes it in most cases.

How do I manually install Easy Anti-Cheat for Fall Guys?

Open Fall Guys' install folder, go into the EasyAntiCheat subfolder, right-click EasyAntiCheat_EOS_Setup.exe and Run as administrator, then choose Repair (or Install). If the prompt asks for a product, Fall Guys uses the EOS/Epic Online Services build. Relaunch the game afterward.

Does Fall Guys EAC work the same on Steam and the Epic Games Store?

Yes — Fall Guys uses the Epic Online Services build of Easy Anti-Cheat (EAC EOS) on both stores, so the same repair and reinstall steps apply. Just launch from whichever client you own it on, and make sure that client and the game are both fully closed before repairing EAC.

Why does Fall Guys EAC fail after a Windows or game update?

Updates can reset EAC's installed state or change a security setting like Memory Integrity that its driver depends on. Re-running EasyAntiCheat_EOS_Setup.exe as administrator to repair the service, and verifying game files, restores it after most updates.

Is it safe to reinstall Easy Anti-Cheat for Fall Guys?

Yes. EAC is a small anti-cheat component, not your game data, so repairing or reinstalling it never touches your progress, cosmetics, or account. Fall Guys redeploys EAC automatically the next time you launch, so a clean reinstall is a safe first move.