Easy Anti-Cheat Crash After Windows 11 June 2026 Update Fix

What is the EAC June 2026 Update Crash?

After the June 2026 Patch Tuesday rolled out KB5094126 and KB5095149, every Easy Anti-Cheat–protected title on Windows 11 24H2/25H2 started hard-crashing at the splash screen or returning an EAC initialization error. The regression is in a kernel callback that EAC's driver (EasyAntiCheat_EOS.sys) relies on for process attestation. Microsoft confirmed the issue on June 9, 2026 and shipped a Known Issue Rollback (KIR) the same day. Consumer PCs pick up the KIR automatically within 24 hours; domain-joined enterprise machines need the KIR Group Policy MSI applied by an admin.

When does it occur?

• The game crashes within 3–5 seconds of the EAC bootstrap window appearing
• "EasyAntiCheat is not installed" appears despite a fresh reinstall
• EAC error codes 30005, 24, 10011 spike after June 10, 2026
• All EAC-protected titles fail the same way on the same PC
• Restarting the PC and verifying game files changes nothing

Affected EAC titles (symptom matrix)

• Fortnite — crashes to desktop with EAC error 30005
• Apex Legends — "EasyAntiCheat failed to install" then closes
• Rust — black screen on launch, no error dialog
• Fall Guys — stuck on Epic Online Services connect, no UI
• Dead by Daylight — crashes after the BHVR logo
• ARK: Survival Ascended — EAC_LoadErrorCode 7 on splash
• Hell Let Loose / Hell Let Loose: Vietnam — closes without warning

Common causes

• KB5094126 (June 10, 2026 cumulative) changed a PsSetCreateProcessNotifyRoutineEx callback EAC depends on
• KB5095149 (June 10, 2026 .NET rollup) accelerated the rollout
• The EAC kernel driver fails attestation against the new Code Integrity policy
• Vulnerable Driver Blocklist update bundled with the same KB flags older EAC drivers
• Memory Integrity (HVCI) re-enables itself silently after the update
• Outdated EAC service from before the May 2026 EAC build (1.5.0.74+)

Step-by-step fixes

1. Verify the KB on your machine. Run wmic qfe list brief /format:table | findstr "KB5094126 KB5095149". If either is installed and you're on Windows 11, you're hit.
2. Wait for the KIR (home users). Microsoft pushes the Known Issue Rollback automatically via Windows Update. Reboot, then run gpupdate /force and try the game again. Most consumer PCs receive it within 24 hours of June 10, 2026.
3. Force the KIR refresh. Open Settings > Windows Update > "Check for updates" — this triggers the KIR config sync. Then reboot. The crash should stop without uninstalling anything.
4. Apply the enterprise KIR Group Policy (managed PCs). Download the MSI from https://aka.ms/kir-windows-11-eac-june-2026. Install it, then in gpedit.msc navigate to *Computer Configuration > Administrative Templates > KB5094126 240625_165702 Known Issue Rollback*, set it to Enabled, run gpupdate /force, reboot.
5. Reinstall the EAC service per game. In your game install folder open EasyAntiCheat\EasyAntiCheat_EOS_Setup.exe, click *Repair Service*, pick the title, run as admin. Repeat for each affected game — this re-stages the latest EAC binaries.
6. Disable Memory Integrity temporarily. Settings > Privacy & Security > Windows Security > Device Security > Core Isolation > toggle Memory integrity off. Reboot. Re-enable once you've confirmed the KIR landed.
7. Update the EAC kernel driver manually. Download the latest standalone EAC installer from https://www.easy.ac/downloads/. Existing 1.5.0.74+ builds include the workaround for the Vulnerable Driver Blocklist.
8. Last-resort uninstall of the buggy KB. In elevated CMD: wusa /uninstall /kb:5094126 /quiet /norestart then reboot. This buys time until Microsoft ships the proper hotfix bundled into the July 2026 Patch Tuesday.

If it still doesn't work

If the KIR refused to apply (gpresult /r shows no KIR policy after multiple reboots), the most common reason is a stale wuauserv cache — repeat the SoftwareDistribution\Download purge in step 3 of the [25H2 upgrade-path guide](/en/errors/windows-11-25h2-upgrade-path-install-fail-0x800f0993-june-2026) and Check for Updates again. For specific games that still throw their game-specific code after the KIR lands, follow the per-title guide: [Fortnite EAC 30005](/en/errors/fortnite-anti-cheat-error-30005) and [Hell Let Loose EAC](/en/errors/hell-let-loose-vietnam-easyanticheat-failed-start-pc). Stress-dreaming about your game crashing? Our [stress dreams guide](https://dreams.decodesignals.com/en/dreams/stress-dreams-uncertain-times) has the cultural-mood side of the same frustration.