: Add the entire Age of Empires 2 DE installation folder to your antivirus exclusion list.
: Right-click on Age of Empires II: DE in your Library > Properties > Installed Files > Verify integrity of game files .
The anti-cheat mechanisms rely heavily on up-to-date Windows security certificates. If your OS is behind on updates, the authentication check will fail. Press to open Settings. Go to Windows Update .
Select the entire installation directory of Age of Empires II: DE. 3. Disable All Mods and Clean the Mod Folder age of empires 2 definitive edition tampering detected fixed
Since disabling your entire antivirus is not a safe long-term solution, the best approach is to add the whole game installation folder to your antivirus's exception list. The game's default installation path is typically C:\Program Files (x86)\Steam\steamapps\common\Age of Empires 2 DE . Instructions vary by software: for , you'll need to add the game to the program's allowlist. For Bitdefender , the process is similar. For Comodo , you may need to disable "shellcode injection detection". For F-Secure , specifically disable "DeepGuard" or add the game to its allowlist.
: Some users find success by removing and reinstalling "Gaming Services" via Windows settings before rebooting and trying again. Steam
Software that "hooks" into the game’s display or memory can trigger a tampering alert. : Add the entire Age of Empires 2
Recent patches or incomplete updates can leave files missing or altered, prompting the anti-cheat to lock you out. Step-by-Step Fixes: How to Resolve the Error 1. The Account Relink (Most Common Fix)
This error is generally designed to prevent cheating, but it can be triggered by innocent background applications, corrupted game files, or faulty system updates. As of 2026, many players still face this issue, particularly following game updates or Windows updates.
When this system is triggered, it effectively locks the player out of the game. After launching, a popup message appears, and upon reaching the main menu, you'll see a stark warning in red text at the bottom right: . Following this message, the main menu's options (like Single Player, Multiplayer, etc.) are grayed out and unselectable, rendering the game completely unplayable . If your OS is behind on updates, the
Wait for Steam to scan your directory. If it finds missing or broken files, it will redownload them. For Xbox App / Microsoft Store Users: Open the on your PC.
Launch the game in offline mode if possible, or navigate directly to your local mod folder.
Account sync errors between Steam and Xbox Live frequently cause this pop-up.
How to Fix the "Tampering Detected" Error in Age of Empires 2: Definitive Edition