EasyAntiCheat Driver | EOSSys.sys loads often; does not support BypassIO → may conflict with DirectStorage


emjkitty

Member
Local time
4:08 PM
Posts
2
OS
Windows 11
Can someone please help me with Epic Games, Easy Anti Cheat giving me BSOD and crashing my game and whole computer.
I have taken it to Micro Center where all hardware passed their hardware testing.
Windows was reinstalled and all drivers are up-to-date as of July 2025.

My NVMe drive passes SMART and surface tests, but BSODs only occur when EasyAntiCheat runs. System passes initial EAC checks but crashes after 25 minutes.
Logs show DCOM permission denials and BypassIO filter conflicts. The drive supports BypassIO, but EAC’s driver doesn’t. I suspect firmware-level I/O instability.

Only by reseating my RAM, I am able to get in the operating system as if nothing happened. Everything boots normally.
The problem is as follows:
I have started up Fortnite and get this log in my Event Viewer:

File System Filter 'EasyAntiCheat_EOSSys' (Version 10.0, ‎2025‎-‎06‎-‎26T05:00:45.000000000Z) does not support bypass IO.
Supported features: 0x4.

I have:
-Ran fsutil bypassIo state c:\ multiple times
-Verified EasyAntiCheat_EOSSys blocks BypassIO during Fortnite runtime
-Confirmed Microsoft NVMe driver is in use
-Ruled out Sysmon or PowerToys as the source of filtering
-Verified BypassIO works when Fortnite isn’t running
-Disabled Core Isolation (Memory Integrity)
-Disabled Virtual Machine Platform (VMP)
-Uninstalled and reinstalled Epic Launcher via direct website download
-Cleared out all leftover config junk, shader caches, and Epic webcache
-Repaired EasyAntiCheat
-Verified specs: AMD Ryzen 5 5600X, RTX 3050, 32 GB RAM, NVMe storage
-Confirmed OS: Windows 11 24H2 (Build 26100.4652)
-NVIDIA driver: 576.88 WHQL (July 2025)


Please can someone help me?
 
Windows Build/Version
Windows 11

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    CPU
    AMD Ryzen 5 5600X
    Motherboard
    MSI PRO B550M-VC WiFi (AM4, mATX)
    Memory
    Corsair Vengeance RGB Pro DDR4 16GB (2x8GB) 3600MHz CL18
    Graphics Card(s)
    Zotac GeForce RTX 3050
    Hard Drives
    Samsung 980 PRO 2TB NVMe SSD (PCIe Gen 4)
    PSU
    EVGA SuperNOVA 650 G+
    Cooling
    Noctua NH-U12S chromax.black

My Computers

System One System Two

  • OS
    Windows 11 Pro 24H2 26100.4652
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Optiplex 7080
    CPU
    i9-10900 10 core 20 threads
    Motherboard
    DELL 0J37VM
    Memory
    32 gb
    Graphics Card(s)
    none-Intel UHD Graphics 630
    Sound Card
    Integrated Realtek
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    2x1tb Solidigm m.2 nvme /External drives 512gb Samsung m.2 sata+2tb Kingston m2.nvme
    PSU
    500w
    Case
    MT
    Cooling
    Dell Premium
    Keyboard
    Logitech wired
    Mouse
    Logitech wireless
    Internet Speed
    so slow I'm too embarrassed to tell
    Browser
    #1 Edge #2 Firefox
    Antivirus
    Defender+MWB Premium
  • Operating System
    Windows 11 Pro 24H2 26100.4061
    Computer type
    PC/Desktop
    Manufacturer/Model
    Beelink Mini PC SER5
    CPU
    AMD Ryzen 7 6800U
    Memory
    32 gb
    Graphics card(s)
    integrated
    Sound Card
    integrated
    Monitor(s) Displays
    Benq 27
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Crucial nvme
    Keyboard
    Logitech wired
    Mouse
    Logitech wireless
    Internet Speed
    still too embarrassed to tell
    Browser
    Firefox
    Antivirus
    Defender
    Other Info
    System 3 is non compliant Dell 9020 i7-4770/24gb ram Win11 PRO 26100.4061

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    CPU
    AMD Ryzen 5 5600X
    Motherboard
    MSI PRO B550M-VC WiFi (AM4, mATX)
    Memory
    Corsair Vengeance RGB Pro DDR4 16GB (2x8GB) 3600MHz CL18
    Graphics Card(s)
    Zotac GeForce RTX 3050
    Hard Drives
    Samsung 980 PRO 2TB NVMe SSD (PCIe Gen 4)
    PSU
    EVGA SuperNOVA 650 G+
    Cooling
    Noctua NH-U12S chromax.black
It's been known online that Easy Anti-Cheat doesn't support BypassIO running.

Until that changes, you have to make a hard choice which is more important to you, playing your games or BypassIO for performance.
 

My Computer

System One

  • OS
    Windows 7

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