Unity New — How To Fix Uplayr1loader64dll Error In Assassin 39s Creed

How to Fix the uplayr1loader64.dll Error in Assassin’s Creed Unity (New 2024-2025 Guide)

Last Updated: 2026
Applies to: Windows 10, Windows 11, Steam, Epic Games, and Ubisoft Connect versions

, do not download replacement DLLs from third-party sites, as these are often meant for "cracked" versions and may cause crashes. Ubisoft Connect : Click the game, go to Properties , and select Verify files : Right-click the game > Properties Installed Files Verify integrity of game files How to Fix the uplayr1loader64

How to Fix the uplay_r1_loader64.dll Error in Assassin’s Creed Unity (New Guide 2026)

Error Code: uplay_r1_loader64.dll is missing / Cannot find uplay_r1_loader64.dll / The program can't start because uplay_r1_loader64.dll is missing from your computer Close any conflicting software (e

Method 6: Disable Conflicting Software

Close any conflicting software (e.g., antivirus programs, overlay software).
Try running the game again.

Step-by-Step:

Press Windows + X and select Terminal (Admin) or Command Prompt (Admin).
In the black window, type the following command and press Enter:
```
regsvr32 /u uplay_r1_loader64.dll
```
(This unregisters the file.)
Now re-register it by typing:
```
regsvr32 uplay_r1_loader64.dll
```
You should see a success message: "DllRegisterServer in uplay_r1_loader64.dll succeeded."
If you get an error saying "The module was loaded but the entry-point was not found," that’s normal for this specific DLL. Skip to Method 5.

Check System Folders: If placing the file in the game folder doesn't work, some users resolve the issue by copying it into C:\Windows\System32 and C:\Windows\SysWOW64, though the game directory is usually preferred. Step-by-Step:

If the file is completely missing, you can manually replace it using files already on your computer or by downloading them from a reliable source.

Common False Solutions to Ignore

While searching for help, you may see these bad suggestions. Avoid them: