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Delta Force ACE security/anti-cheat error (fix)

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IsThisGameDown

Last checked

September 23, 2026

Delta Force Steam Discussions — "ACE error an exception occurred. Cant play game" ↗

The game crashes to desktop during launch with the dialog "Error ACE Center in game. An exception occurred [while] the game security component was running, please close unnecessary software or other games, or restart the machine and try again. 1-0-0" instead of reaching the main menu.

Also appears as: delta force ace error, delta force ace center error, delta force ace security center, delta force ace center error 1-0-0, error ace center in game an exception occurred, delta force anticheat expert error, ace center exception error, delta force anti cheat initialization failed

ACE (AntiCheat Expert) is a separate Windows service Delta Force installs and relies on to launch; when that service is disabled, blocked by security software, or conflicts with Windows' Memory Integrity (Core Isolation) feature, the game throws a security/exception error instead of starting. This is a local configuration problem, not a server-side issue — reinstalling or re-enabling the ACE service directly is the most-reported fix.

Fix it, step by step

  1. Run ACE-Setup64 and restart Delta Force

    Open your Delta Force install folder (Steam Library > right-click Delta Force > Properties > Installed Files > Browse) and navigate to Game\DeltaForce\Binaries\Win64\AntiCheatExpert. Run ACE-Setup64, click Yes/OK to confirm, then restart Delta Force to reinstall the service.

  2. Set the AntiCheatExpert services to Manual or Automatic

    If that doesn't help, open services.msc (Windows Run dialog), find "AntiCheatExpert Service" and "AntiCheatExpert Protection," and set their startup type to Manual or Automatic if either is Disabled.

  3. Toggle off Memory Integrity under Core Isolation

    Toggle off Memory Integrity under Windows Security > Device Security > Core Isolation — a conflict between it and ACE's kernel driver has been reported to cause this error.

  4. Verify integrity of game files in Steam

    Run Steam's "Verify integrity of game files" (Properties > Installed Files) to repair anything the ACE reinstall didn't fix.

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