Windows 11 update KB5121003, released in August 2026, addresses over 400 vulnerabilities but has caused crashes in games like ARC Raiders and The Finals. The game studio Embark has confirmed that the crashes are linked to the inpoutx64.sys driver, which has compatibility issues due to the update. Users have reported errors such as “Hang detected on GameThread” and “EXCEPTIONACCESSVIOLATION” after installing the update. Embark has provided a workaround to stop and delete the inpoutx64.sys service to resolve the crashes. Uninstalling the update also appears to fix the issue. Additional reports indicate crashes in other games and graphics-related problems following the update.