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Error codeDead by DaylightWindows PC
Dead by Daylight: "Untrusted System File"
Windows system files are damaged
This error can appear when some of your Windows system files have become corrupted.
Fix it
How to fix "Untrusted System File"
Make sure your copy of Windows is genuine and fully updated.
If you use a Windows Insider or Preview build, roll back to a public build.
Open Command Prompt as administrator, run sfc /scannow and let it finish.
If nothing helps, you may need to reinstall Windows.
From Dead by Daylight's help pages: support.deadbydaylight.com, in our words. Checked on 11 November 2026. If the steps do not help, Dead by Daylight's own support is the next stop.
More
More Dead by Daylight errors and common problems
- Game crashesOld drivers, damaged files or background apps
- Keeps disconnectingWeak Wi-Fi, router or DNS trouble
- Can't join a matchModerate or Strict NAT limits connections
- Matchmaking lockedDisconnection penalty after leaving matches
- Game Security Violation DetectedRGB lighting software conflicts with EAC
- Error Code 130Servers busy with too many logins
- Error Code 107Connection dropped and came back
- Launch ErrorAnti-cheat blocks an outdated driver
- Version MismatchYou and your friends run different versions
- EAC Error Code 4Easy Anti-Cheat could not verify the game
All Dead by Daylight errors and common problemsLive Dead by Daylight status