EasyAnticheat does not support bypassing I/O.

Hello there, did you manage to get this sorted or are you still having issues?

Darko

Me having the same issue for more then 6 months.. not able to fix. it is a windows issue. Only happening on Windows 11 24h2. 
Games like Fortnite etc the same problem. Windows is unloading EAC, so the game crashes. No fix found yet. I made a reboot. New windows installation, new everything. Still not working. Its mostly connected to you Intel processor. My friend having a different intel, same windows version, not having this issue. 

This error is most likely caused by a feature that was implemented in Windows 11, called BypassIO, which optimizes and speeds up file reads on your storage disk, but as a downside flags EAC to shut down the game. 

A common bug are the sudden crashes to the desktop with no error message.

Checking the Windows Event Viewer shows the following error message:

File System Filter 'EasyAntiCheat_EOSSys' (Version 10.0, <u+200e>2025<u+200e>-<u+200e>03<u+200e>-<u+200e>28T19:10:53.000000000Z) does not support bypass IO. Supported features: 0x4.

The reason I am calling this feature to be the cause of the crashes, is because I used to play Apex Legends on my old pc with zero crashes. Note that this was done on a Samsung 970 EVO NMVe 3.0 drive, which does not support the operating system's IO Path optimizations. I recently upgraded my pc, including the disk drive to a Samsung 990 EVO Plus Nvme 4.0 and the crashes to the desktop are happening consistently withing 1-2 games of playing Apex Legends.  Reason? Version 4.0 of the drive automatically enables the BypassIO feature in Windows 11.

A solution is to wait for either Windows 11 to fix this issue or ask EAC to come up with a solution to support this feature to prevent at least the given errors in the event viewer and determine whether this is the ultimate cause of the crashes (which I am pretty sure of it).

As an alternative you could try to run your games on a older drive (which doesn't support BypassIO), but one could make the argument that downgrading hardware is not a proper solution to the problem while games are upgrading graphics and such.

I hope this helps to shed some light on this issue.

Also having this issue. Hoping I could open a ticket for EAC but no luck.

Leaving a update to my problem, ive managed to fix the crashes, idk if it was the fact i got a new gpu or the fact i turnes down my performance cores on my cpu.

hope this helps anyone, my cpu performance cores were running on rly high and made bluescreens and crashes. Gl to everyone hope u manage to fix it

It's early days,  but I think I am able to share a potential resolution that may help other users.

I am an IT Field Engineer, and also run the Youtube Channel -

https://youtube.com/@nextlevelsimgaming?si=xdBPGa56P-Fc7GnH

As stated, the issue is that Easy Anti Cheat shows that File Filter does not support Bypass IO, this is a widespread issue that is affecting a number of Core Ultra 9 owners, largely due to the new architecture of the processor, but also other users in general, the issue is that the NVME driver is not correctly filtering the ByPass IO feature, which is a Windows 11 feature, and detailed here - 

https://learn.microsoft.com/en-us/windows-hardware/drivers/ifs/bypassio

Suggested fixes show that disabling Core Isolation, and Virtualisation, and being on the latest Windows 24H2 should mitigate this issue, this is not however correct for Intel.

First of all, I completely uninstalled EasyAntiCheat.

On my system for example, I have 4 Nvme drives, all are Bypass IO compatible, so the initial error did not make sense to me, upon investigation of the filter drivers, the Intel RST driver relies on Virtualisation and Hyper V to run correctly

C:\Windows\System32>fsutil bypassIo state C:\
BypassIo on "C:\" is currently supported
    Storage Type:   NVMe
    Storage Driver: BypassIo compatible

I set the following elevated commands to activate Hyper V, and also Credential Guard, also activated Intel Virtualization, Core Isolation is still disabled (open command prompt as admin, and copy and paste each value)

DISM /Online /Enable-Feature /All /FeatureName:Microsoft-Hyper-V reg add

HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard /t REG_DWORD /v

EnableVirtualizationBasedSecurity /d 1 /f reg add

HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\CredentialGuard /t

REG_DWORD /v Enabled /d 1 /f reg add HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity /t REG_DWORD /v Enabled /d 1 /f reg add

HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\KeyGuard\Status /t REG_DWORD /v CredGuardEnabled /d 1 /f reg add

HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\KeyGuard\Status /t

REG_DWORD /v KeyGuardEnabled /d 1 /f

I also in BIOS disabled AMI Native NVME Driver Support
I then reinstalled EasyAntiCheat from drive H from the iRacing EAC folder
Previously the game would crash within minutes, however now, I have played successfully and have had no Events relating to the issue,