If those don’t work, follow the steps below in order.
Then re-enable antivirus.
To resolve this issue immediately:
If the issue persists after these steps, the error is likely due to a third-party software conflict (such as RivaTuner Statistics Server or MSI Afterburner) hooking into the game overlay. Temporarily disable these overlays to test.
To fix the uplay_r1_loader64.dll missing error in Assassin's Creed Unity , you generally need to
restore the file from your antivirus quarantine or manually copy it from the installation backup folders
. This error commonly occurs because antivirus software flags modified game files as "false positives" and blocks them. Option 1: Restore the file from Windows Security
Most often, the file isn't actually gone; it's just been quarantined by Windows Defender. Windows Security Virus & threat protection Protection history Look for a "Severe" threat or "Blocked" item related to uplay_r1_loader64.dll and select Important: To prevent it from happening again, go to Manage settings Exclusions and add your game folder to the exclusion list. Option 2: Copy from the "NoDVD" or "Redist" folder
Many game installers include a backup of these files in a subfolder within the main directory. Assassin's Creed Unity installation folder. Look for a folder named Inside, locate the uplay_r1_loader64.dll Copy and paste it directly into the main game folder where is located. Option 3: Manual download (Use Caution)
If the file is completely missing, you can download a replacement from a reputable source. Download the 64-bit version of the file from a site like DLL-files.com
Extract the file and paste it into your game's installation directory.
Be cautious when downloading DLLs from third-party sites, as they can sometimes contain malware.
If you're using a repack (like FitGirl or DODI), ensure you've turned off your antivirus installation to avoid missing files from the start. specific guide for a different version of the game or a particular antivirus software
To fix the uplay_r1_loader64.dll missing error in Assassin's Creed Unity, you typically need to restore the file from your antivirus quarantine, manually replace it from the game's internal folders, or reinstall the Ubisoft Connect client. This error occurs because the file, which is a critical part of the Ubisoft API loader, is often flagged as a "false positive" by security software and deleted or blocked. Primary Fixes for Assassin's Creed Unity 1. Restore from Antivirus Quarantine
Most modern versions of Windows Defender or third-party antivirus software flag this specific DLL as a threat and move it to quarantine.
Open Windows Security (or your specific antivirus software). Go to Virus & threat protection > Protection history. Locate the entry for uplay_r1_loader64.dll. Click Actions and select Restore.
To prevent it from happening again, add the Assassin’s Creed Unity installation folder to your antivirus exclusions list. 2. Manual Replacement from Game Folders
Some versions of the game include a backup of the necessary DLL files within the installation directory itself. Navigate to your main Assassin’s Creed Unity game folder.
Look for a subfolder named NoDVD or 3DM (common in specific digital distributions). Copy the uplay_r1_loader64.dll file found there. If those don’t work, follow the steps below in order
Paste it directly into the main game folder where ACU.exe is located. 3. Update or Reinstall Ubisoft Connect
Because this DLL is a part of the Ubisoft Connect (formerly Uplay) ecosystem, a corrupted client can cause the error.
Download the latest version of the Ubisoft Connect Desktop App.
Install it over your existing version to repair missing components.
Alternatively, use the Verify Files feature in the Ubisoft Connect library by right-clicking Assassin's Creed Unity and selecting Properties > Local Files > Verify files. System-Wide Troubleshooting
If the game-specific fixes do not work, use these Windows-level tools to repair your environment: DLL-files.com uplay_r1_loader64.dll free download - DLL-files.com
To fix the uplay_r1_loader64.dll Assassin's Creed Unity , you generally need to
restore the file from your antivirus quarantine or manually replace it in the game's installation directory
. This error occurs because the file—part of the Uplay API—is often flagged as a "false positive" by security software and deleted or blocked. Method 1: Restore from Antivirus (Most Common) Most modern Windows users find that Windows Defender or other antivirus programs have quarantined the file. Windows Security Virus & threat protection Protection history Look for an entry mentioning uplay_r1_loader64.dll or a "Severe" threat related to the game folder. and select
Add the Assassin's Creed Unity game folder to your antivirus Exclusion list to prevent it from being deleted again. Method 2: Internal Game Folders
Some versions of the game include a backup of the necessary DLLs in a subfolder. Navigate to your game installation directory (e.g., Assassin's Creed - Unity\NoDVD\3DM uplay_r1_loader64.dll inside that folder. it into the main directory where the file is located. Method 3: Manual Download and Replacement
If the file is completely missing and cannot be restored, you can manually replace it. a verified version of the DLL from a reputable source like DLL-files.com the downloaded uplay_r1_loader64.dll file into the main Assassin's Creed Unity folder. Register the DLL (Optional):
If the error persists, open Command Prompt as an administrator and type regsvr32 uplay_r1_loader64.dll , then press Enter. Method 4: Update Ubisoft Connect
If you are using a legitimate copy through Steam or Ubisoft, ensure your client is up to date. An outdated Ubisoft Connect
client can fail to provide the necessary API hooks for older games. Download the latest version directly from the Ubisoft website and run it with administrator rights.
To fix the uplay_r1_loader64.dll error in Assassin's Creed Unity
, you generally need to restore the file from your antivirus quarantine or manually replace it in the game's directory. This error usually occurs because Windows Defender or other antivirus software flags the file as a "false positive" threat and blocks it. 1. Restore from Windows Security
The most common cause is the file being quarantined by Windows Defender. Open Windows Security: Go to Virus & threat protection. View History: Click on Protection history. Then re-enable antivirus
Identify the File: Look for an entry involving uplay_r1_loader64.dll labeled as "Severe" or "Threat quarantined". Restore: Click Actions, then select Restore. 2. Add a Folder Exclusion
To prevent the error from returning after a restore, tell your antivirus to ignore the game folder. Go to Virus & threat protection settings > Manage settings.
Scroll down to Exclusions and click Add or remove exclusions.
Select Add an exclusion > Folder and choose your main Assassin's Creed Unity installation folder. 3. Use the Internal DLL Recovery
If you are using a specific version (like a Fitgirl pack), a copy of the DLL might already be in your game folder under a subfolder. Navigate to your game's installation directory. Check for a folder named NoDVD or 3DM.
Copy the uplay_r1_loader64.dll found there and Paste it into the main game folder where the executable (ACU.exe) is located. 4. Manual Reinstallation
If the file is completely gone, you can try to reinstall the Uplay (Ubisoft Connect) client or download the specific DLL.
Download: You can find the file on reputable sites like DLL-files.com.
Placement: Place the downloaded .dll directly into the game's installation folder.
SFC Scan: Alternatively, run sfc /scannow in an Admin Command Prompt to repair general system file errors.
To fix the uplay_r1_loader64.dll error in Assassin's Creed Unity
, you generally need to restore the file from your antivirus quarantine or manually replace it from your game's internal backup folders. This error is usually a "false positive" where Windows Defender or other antivirus software flags the file as a threat and blocks it. 1. Restore the File from Windows Security
Most of the time, the file isn't actually "missing"—it's just being held hostage by your antivirus. Open Windows Security and go to Virus & threat protection. Click on Protection history.
Look for a "Severe" threat or blocked item that mentions uplay_r1_loader64.dll. Click Actions and select Restore.
Crucial Step: Immediately add your Assassin's Creed Unity folder to the "Exclusions" list in your antivirus settings so it doesn't delete the file again the next time you launch the game. 2. Use the Built-in Backup (NoDVD Folder)
If you are using a specific version of the game (like a repack), the installer often leaves a backup of the necessary DLLs inside the game directory. Go to your main Assassin's Creed Unity installation folder. Look for a folder named NoDVD or SKIDROW. Inside, you should find a copy of uplay_r1_loader64.dll.
Copy it and Paste it directly into the main game folder where the .exe is located. 3. Verify Game Files (Official Versions)
If you own the game on Steam or Ubisoft Connect, use the built-in repair tool to download the correct official file. To resolve this issue immediately:
Steam: Right-click the game > Properties > Installed Files > Verify integrity of game files.
Ubisoft Connect: Go to the game's page > Properties > Verify files. 4. Manual Download (Last Resort)
If the file is completely gone and you don't have a backup folder, you can download it from a repository like DLL-files.com.
Warning: Only download from reputable sources. Once downloaded, extract the .dll and paste it into the game's main installation directory.
Common Pitfall: If you just replace the file without adding a "Folder Exclusion" in your antivirus, the game might crash or the file will disappear again within seconds of you trying to play. If you're still having trouble, let me know: Are you using the Steam, Ubisoft, or a repack version? What antivirus are you running?
Does the error say the file is "missing" or is it a "procedure entry point" error?
I can give you a more specific walkthrough based on those details!
Here are steps you can follow to potentially fix the uplay_r1_loader64.dll error in Assassin's Creed Unity:
Difficulty: Easy | Success Rate: 90%
Corrupted or missing game files are a primary cause. Verification tools compare your game files against the master server and replace any that are wrong.
The launcher itself may be broken. Reinstall it without re-downloading the entire game.
This method often restores the proper DLL registration.
Drive permissions or encryption (BitLocker) can interfere with DLL loading.
Published by: TechGame Fix Hub
Difficulty: Easy
Time: 5–10 minutes
If you’re reading this, you’ve likely just tried to launch Assassin’s Creed Unity only to be greeted by a pop-up error that says something like:
“The program can’t start because uplayr1loader64.dll is missing from your computer.”
Or
“Error loading uplayr1loader64.dll. The specified module could not be found.”
Don’t worry. This is a common issue, especially with newer Windows updates or after reinstalling the game. The good news? It’s almost always fixable in a few minutes.
In this guide, I’ll walk you through exactly what this file is, why it’s missing, and the 6 proven methods to get you back into 18th-century Paris.