EasyAntiCheat Untrusted System File
What is this error?
EasyAntiCheat detected a modified or untrusted system file and blocked the game from launching as a security measure.
Common causes
- modified system DLLs
- cracked software modifying system files
- outdated Windows with unpatched DLLs
- third-party software injecting into system processes
- corrupted Windows Update
How to fix it
- Run sfc /scannow
- update Windows fully
- remove suspicious software
- repair EasyAntiCheat
Too many steps? Crashless can diagnose this automatically — checks your drivers, temps, VRAM, and 400+ known error patterns.
Get free AI diagnosis Detailed analysis
"EasyAntiCheat: Untrusted system file" means EAC scanned your Windows system files and found one that doesn't match Microsoft's expected signature. EAC blocks the game to prevent potential cheating through modified system files.
The error message usually names the specific file (like 'C:\Windows\System32\something.dll').
How to fix it:
- Run 'sfc /scannow' in an admin Command Prompt — this is the #1 fix. SFC replaces modified system files with the original Microsoft versions
- If sfc reports it found files but couldn't fix them, run 'DISM /Online /Cleanup-Image /RestoreHealth' first, then sfc again
- Install ALL pending Windows updates — outdated DLLs trigger this error
- Check if you have any 'system optimizer' or 'tweaking' software — these sometimes modify system DLLs. Uninstall them
- If the error names a specific DLL, search for that DLL name + 'EasyAntiCheat untrusted' for targeted solutions
- Repair EasyAntiCheat: go to the game folder > EasyAntiCheat > run EasyAntiCheat_Setup.exe > Repair
- As a last resort, an in-place Windows repair upgrade will replace all system files while keeping your apps and data
When to seek help
If this error keeps happening after trying the fixes above, it may point to a deeper hardware or system issue. Consider professional help if:
- The crash occurs across multiple games or applications
- You see the same error after a clean Windows install
- Your PC is less than a year old (could be a warranty issue)
- You smell burning or hear unusual sounds from your PC
Or let Crashless do the deep analysis for you -- our AI checks drivers, temps, event logs, and 400+ known patterns automatically.
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