Below is the definitive troubleshooting guide to resolve the issue and get back to exploring 18th-century Paris. What is the uplay_r1_loader64.dll Error?
Share it with a friend who keeps crashing at launch. And subscribe to the blog for more PC gaming fixes.
Disclaimer: This guide is for educational purposes only. Always ensure you have a legitimate copy of the game. If you're still having trouble, What program are you currently running? Did this error appear suddenly or after an update ? I can help troubleshoot further! Share public link
How to Fix the "uplay_r1_loader64.dll Missing" Error in Assassin's Creed Unity (2026 Guide) Below is the definitive troubleshooting guide to resolve
How to Fix Uplay_r1_loader64.dll Error in Assassin's Creed Unity (2026 Updated Guide)
: 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
from that subfolder and paste it directly into the main game folder where the executable ( ) is located. 🛡️ Preventing Re-Deletion And subscribe to the blog for more PC gaming fixes
One final, crucial point: the easiest way to avoid this entire saga is to own an of Assassin's Creed Unity . Ubisoft has updated and patched the official version extensively, ensuring it runs smoothly on modern Windows systems. Legitimate versions on Steam, the Epic Games Store, or directly from Ubisoft are almost never plagued by this specific DLL issue. If you are using a repacked or cracked version, you are encountering a problem that is essentially a feature of that unofficial release, not a bug.
Make sure to download and install both the and x64 versions, as 64-bit games often rely on both architectures to bridge launcher communications. Restart your computer after the installation completes.
Once the exclusion is set, launch the game. The DLL file should now be able to load without being blocked. If you're still having trouble, What program are
Find the uplay_r1_loader64.dll file, click it, and select .
If updating doesn’t work, try reinstalling Ubisoft Connect:
Copy it and paste it directly into the main Assassin's Creed Unity folder (where the .exe file resides). If prompted, choose . 3. Reinstall or Repair 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.