: Steam often packages older Ubisoft games with an obsolete version of Uplay that is no longer compatible with modern Windows environments or the current Ubisoft infrastructure.
Aggressive security software frequently flags and quarantines essential legacy files like uplay_r1_loader.dll or uplay_r164.dll .
Since aggressive antivirus is the prime suspect, this is the first solution to try.
Follow these troubleshooting steps in sequence to resolve the issue. 1. Perform a Deep Clean and Reinstall Ubisoft Connect uplay-ach-earnachievement could not be located
To help narrow down the fastest fix for your specific setup, please let me know: What are you trying to play?
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Manually delete any leftover folders in C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher . Reinstall the latest version of Ubisoft Connect. : Steam often packages older Ubisoft games with
instead of the old "Uplay" launcher. Download the latest version from the official Ubisoft website Verify Game Files: Right-click your game in Steam or Ubisoft Connect, go to Properties , and select Verify integrity of game files . This will replace any corrupted files automatically. Disable Antivirus: Your security software might have quarantined uplay_r1_loader.dll uplay_r1_loader64.dll . Check your Protection History and "Allow" the file if it was blocked. Microsoft Learn 🛠️ Detailed Troubleshooting 1. Manual DLL Replacement
When prompted, do not delete your downloaded games unless you want to re-download them. Once uninstalled, restart your computer.
If the error is specific to one game, the local DLL in the game's folder might be corrupt. Ubisoft Connect: Follow these troubleshooting steps in sequence to resolve
Close the game and the Ubisoft Connect desktop app completely.
If you are trying to launch an older Ubisoft game and get hit with a crash and a pop-up stating that the procedure entry point you are not alone. This is a common compatibility issue. It happens because Ubisoft rebranded its PC client from Uplay to Ubisoft Connect, changing how games communicate with the platform's achievement system.
Click the in the top-left corner and open Settings .
When Ubisoft updated Uplay to Ubisoft Connect, they altered or removed these older API entry points from the modern launcher files.
Right-click the game’s in its installation folder. Select Properties > Compatibility . Check "Run this program as an administrator." Hit Apply and launch. 🏗️ Advanced Troubleshooting Reinstall Ubisoft Connect