EAAntiCheat.GameService

EAAntiCheat.GameService.exe is the runtime service of EA Javelin Anticheat, Electronic Arts' in-house kernel-level anti-cheat. It launched in 2022 as EA AntiCheat and was renamed Javelin in late April 2025. It protects EA's online titles, including Battlefield 6 and 2042, EA Sports FC, Madden, and F1. The separate installer, EAAntiCheat.Installer.exe, has its own plate in this guide.

What running it does to your system: Javelin loads a signed EA kernel driver (eaanticheat.sys) that scans memory for cheat signatures, checks the integrity of loaded modules, and enforces a denylist of incompatible or known-vulnerable third-party drivers. EA's published documentation states the service and driver run only while a protected game is open and shut down when it closes, and that the system is scoped to game integrity rather than unrelated data; Battlefield 6 additionally requires Secure Boot and TPM 2.0. Two real-world frictions are documented: Javelin intentionally blocks Linux and Steam Deck, and it can collide with Riot Vanguard when both drivers are active, which PC Gamer described as a turf war over the same protected memory.

The practical one for most players is the incompatible-driver message: Javelin refuses to launch when it finds a blocklisted kernel driver, which is often a hardware-monitoring or RGB tool shipping an old vulnerable driver such as WinRing0 (also catalogued in this guide). Updating or closing that tool clears it. If a crash points at eaanticheat.sys, running the EA AntiCheat installer as administrator repairs it, and the protection removes itself when you uninstall the last EA game that used it.