In this guide, we’ll walk you through the steps to fix the Untrusted System File error in Apex Legends so you can get back into action without any interruptions.
Apex Legends is a popular free-to-play Hero Shooter developed by Respawn Entertainment. In this fast-paced game, players choose from a growing roster of unique Legends, each with their own powerful abilities. Apex Legends combines the best elements of a Hero Shooter and a Battle Royale, delivering intense squad-based gameplay with innovative mechanics.
However, like any online multiplayer game, Apex Legends is not without its issues. One common problem players encounter is the “Untrusted System File” error. This error typically occurs due to a conflict with Easy Anti-Cheat (EAC) or a corrupted DLL file. If you’re facing this issue, don’t worry—it’s easy to fix!
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How to Fix Untrusted System File Error in Apex Legends
Follow these simple steps to fix the Untrusted System File error in Apex Legends:
Step 1: Open the Apex Legends Game Folder
- Open File Explorer on your PC.
- Navigate to the Apex Legends installation directory. By default, the path is:
This PC > Windows (C:) > EA Games > Apex > paks > Win64
- If you installed the game in a different location, go to that specific folder instead.
Step 2: Locate the Problematic DLL File
- Inside the Win64 folder, look for a file named:
ui(01).dll
- This file is often responsible for triggering the Untrusted System File error.
Step 3: Delete the DLL File
- Right-click on the
ui(01).dllfile. - Select Delete to remove it from the folder.
- Confirm the deletion if prompted.
Step 4: Restart and Launch Apex Legends
- Close File Explorer.
- Open the EA App or Steam, depending on where you installed Apex Legends.
- Click Play to launch the game.
- The game should now start without the Untrusted System File error!
Why Does This Error Happen?
The Untrusted System File error usually occurs due to one of the following reasons:
- Corrupted or Modified Files: The
ui(01).dllfile might be outdated or corrupted, causing Easy Anti-Cheat to flag it as untrusted. - Recent Game Update: Sometimes, game updates introduce changes that make older files incompatible.
- Third-Party Software Conflicts: Security software, overlays, or mods might interfere with the game’s files.
Additional Troubleshooting Tips
If the error persists after deleting the ui(01).dll file, try these extra troubleshooting steps:
1. Verify Game Files
- Open Steam or the EA App.
- Right-click on Apex Legends and select Properties.
- Go to Installed Files (Steam) or Repair (EA App).
- Select Verify Integrity of Game Files.
- Wait for the process to complete and relaunch the game.
2. Run Apex Legends as an Administrator
- Right-click on the Apex Legends shortcut.
- Select Run as Administrator.
- This ensures the game has the necessary permissions to run smoothly.
3. Update Your Graphics Drivers
- Visit the official NVIDIA or AMD website.
- Download and install the latest drivers for your GPU.
- Restart your PC and try launching the game again.
4. Disable Third-Party Software
- Close any overlays such as Discord, MSI Afterburner, or GeForce Experience.
- Temporarily disable your antivirus software and check if the game runs.
The “Untrusted System File” error in Apex Legends is easy to fix by deleting theui(01).dll file. If the issue persists, verifying game files, running the game as an administrator, updating drivers, and disabling third-party software can help resolve the problem.
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