Easy Anti-Cheat (EAC) Untrusted System File & Error 30005: Root Causes & Solutions

The Common Frustration of EAC Launch Errors

Games utilizing Easy Anti-Cheat (Apex Legends, Fortnite, Rust, War Thunder) periodically refuse to start, throwing generic errors such as "Error 30005: CreateService / StartService failed with 1275" or "Untrusted system file (C:\Windows\System32\...\*.dll)".

Diagnosing the 3 Most Common EAC Failure Modes

1. Error 30005 (Driver Lock / Antivirus False Positive): The EAC kernel service driver (EasyAntiCheat.sys) in C:\Program Files (x86)\EasyAntiCheat is locked by Windows Defender or third-party antivirus software. Deleting EasyAntiCheat.sys forces the launcher to generate a clean, unlocked driver.
2. Untrusted System File (Corrupted Windows DLL): Occurs when system files (such as d3d11.dll or crypt32.dll) fail WHQL cryptographic hash checks. Running sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth repairs the corrupted files.
3. Driver Signature Enforcement Violation: Custom hardware lighting software (RGB controllers) or overclocking utilities with vulnerable unsigned drivers are blocked by EAC memory scanners.

Review our deep dive on Apex Legends EAC hardware ID ban telemetry.

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