Persistent Integrity Error 0x8000001 - All standard troubleshooting not working
I'm experiencing a recurring "Integrity error 0x8000001 - Apex exited due to a failure of game integrity" on PC (Steam version). The error first appeared a few days ago, briefly resolved after troubleshooting, then returned the next time I restarted my PC and has persisted since, despite no new software, updates, or hardware changes being made between sessions.
The error occurs immediately after reaching the lobby (not on initial launch).
System specs:
- OS: Windows 11 Home, Version 10.0.26200, Build 26200
- CPU: Intel Core i5-8400
- GPU: AMD Radeon RX 580
- RAM: 16GB
- Motherboard: ASUS PRIME B360-PLUS
- Platform: Steam
Troubleshooting already completed (in order):
1. Verified integrity of game files via Steam - multiple times
2. Reinstalled Easy Anti-Cheat via the EasyAntiCheat_Setup.exe tool in the install directory
3. Deleted the EasyAntiCheat folder entirely and let Steam rebuild it via verify
4. Deleted the EasyAntiCheat .sys file specifically and restarted
5. Moved/reset the Respawn "Saved Games" profile folder
6. Updated network (LAN) drivers
7. Installed Intel Management Engine Interface (chipset) driver
8. Ran sfc /scannow and DISM RestoreHealth - no corruption found
9. Set a custom (non-system-managed) paging file size
10. Changed DNS servers to 1.1.1.1 / 1.0.0.1
11. Added Apex and EasyAntiCheat folders to Windows Defender exclusions
12. Closed all background/overlay software (Discord, Medal, GPU overlays) before testing
13. Confirmed no virtual drive software (Daemon Tools etc.) is or has been installed
14. Checked Windows Event Viewer - no consistent crash/hang event logged at time of error (one isolated Application Hang event for r5apex_dx12.exe occurred once, but has not recurred)
15. Tested on a completely fresh local Windows admin account - same error occurs
16. Performed a full clean uninstall and reinstall of Apex Legends, including manually deleting leftover Apex and EasyAntiCheat folders before reinstalling - same error occurs
17. Checked Resource Monitor during a session - all network connections for r5apex_dx12.exe showed as ESTABLISHED with no packet loss, ruling out a connectivity issue
Given that the issue persists across a full reinstall and a fresh Windows user profile, this does not appear to be a local file corruption or account-profile issue. I suspect this may require investigation on your end (e.g. a server-side EAC flag tied to my account, hardware ID, or installation).
