Delta Force Anti-Cheat Error: How to Fix It (ACE Won't Install)

Delta Force’s anti-cheat errors come from ACE (Anti-Cheat Expert) — a kernel-level anti-cheat that needs Secure Boot, TPM 2.0, and its two Windows services running — not from a broken game or account. Delta Force uses Tencent’s ACE, which loads a kernel driver on launch, so an “Anti-Cheat Not Installed” message, an “ACE Center Exception,” or a silent failure to launch almost always traces back to ACE itself or to a BIOS security setting it requires.

This covers the most common Delta Force ACE failures — “Anti-Cheat Not Installed,” “ACE Center Exception,” and won’t-launch — in the order most likely to fix them.

1. Reinstall ACE from the Delta Force folder

Start here. It resets the anti-cheat to a clean state without touching your game files or account.

1. Fully close Delta Force and Steam.
2. In Steam, right-click Delta Force → Manage → Browse local files.
3. Navigate to ...\Delta Force\Game\DeltaForce\Binaries\Win64\AntiCheatExpert.
4. Right-click ACE-Setup64.exe → Run as administrator and let it finish.
5. Restart your PC so the kernel driver reloads, then relaunch Delta Force.

2. Enable Secure Boot and TPM 2.0 (required)

ACE requires Secure Boot and TPM 2.0 — they are mandatory for Delta Force, not optional. If either is off, ACE won’t load and the game won’t launch.

1. Press Win + R, type msinfo32, press Enter.
2. Confirm Secure Boot State: On and BIOS Mode: UEFI.
3. Press Win + R, type tpm.msc — it should show TPM 2.0, ready for use.
4. If either is off, enable it in your motherboard’s BIOS (look for fTPM on AMD or PTT on Intel, plus Secure Boot):
   • Secure Boot: ASUS · Gigabyte · MSI · ASRock
   • TPM 2.0: ASUS · Gigabyte · MSI · ASRock

3. Set the AntiCheatExpert services to Automatic

The “ACE Center Exception” and many launch failures are simply the ACE services not starting.

1. Press Win + R, type services.msc, press Enter.
2. Find AntiCheatExpert Protection and AntiCheatExpert Services.
3. For each: right-click → Properties → set Startup type to Automatic → Apply → Start.
4. Restart your PC and relaunch Delta Force.

4. Run Delta Force and Steam as administrator

ACE’s driver needs elevated permissions to install and load.

1. Right-click your Steam shortcut → Properties → Compatibility → check Run this program as an administrator.
2. Relaunch Steam, then start Delta Force.

5. Close conflicting software

ACE refuses to load — or throws exceptions — when it detects software that hooks into games. Before launching, close:

• Debuggers, automation/macro scripts, and remote-control software (AnyDesk, TeamViewer).
• Virtual machines and sandboxing tools.
• Frame-capture and overlay tools you don’t need.
• Hardware macro programs and some RGB/fan utilities.

A common cause is a conflict with another anti-cheat’s leftover driver (for example Easy Anti-Cheat from another game) — reboot cleanly and launch only Delta Force to isolate it.

6. Check antivirus and firewall blocks

1. Check your antivirus quarantine for ACE, AntiCheatExpert, or ACE-Setup64 and restore anything found.
2. Add the Delta Force install folder as an antivirus exclusion.
3. Confirm your firewall allows Delta Force and the ACE services through — login/anti-cheat error codes are frequently a blocked connection rather than a broken install.

7. Verify game files and check Memory Integrity

1. In Steam, right-click Delta Force → Properties → Installed Files → Verify integrity of game files.
2. Check Memory Integrity (Core Isolation) under Windows Security → Device Security — a conflict with ACE’s kernel driver can block launch. Toggle it off, reboot, and test if you’re still stuck after everything above.

Related guides

• Delta Force Stuttering Fix
• Best Delta Force Settings for FPS
• Why Anti-Cheat Needs Secure Boot and TPM
• EAC vs BattlEye vs Vanguard vs Ricochet vs VAC compared
• Is Kernel-Level Anti-Cheat Safe?

Delta Force’s ACE anti-cheat is stricter about Secure Boot, TPM, and kernel drivers than most — reinstall ACE from ACE-Setup64.exe first, confirm Secure Boot and TPM 2.0 are on rather than off, and make sure both AntiCheatExpert services are set to Automatic. That sequence clears the large majority of ACE launch errors.