VRChat cannot start after installing patch KB5026372 on Windows 11.
complete
ishida0503
- Install KB5026372 on Windows 11.
- Enable "KERNAL-MODE HARDWARE-ENFORCED STACK PROTECTION" in Windows Security Features.
- Launch VRChat.
- "30005 StartService EasyAntiCheat EOSSys failed with 1275" occurs and fails to start.
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Tupper - VRChat Head of Community
updated the status to
complete
A new version of EOS / EAC has been released and updated for VRChat that reportedly fixes this issue.
A
updated the status to
tracked
Tony_Lewis
Just to clarify,
this issue not happen if only install Windows patch.
If you enable, Kernel-mode Hardware-enforced Stack Protection, this issue happen.
(Kernel-mode Hardware-enforced Stack Protection is a kernel mode attack mitigation, so disabling this will degrade the security of your system)
Anyway, need to fix.
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makihiro
EAC in-kernel driver is not enable "CET Shadow Stack Compatible" now(2023-05-10).
I want a new EAC driver support Intel CET/AMD Shadow Stack.
My Workaround
This procedure disable Kernel-mode Hardware-enforced Stack Protection
- Open Configuration in Windows
- Open privacy and security settings
- Open Windows security
- Open Device Security
- Disable Kernel-mode Hardware-enforced Stack Protection
- Reboot Windows