Then re-enable antivirus.

3. Reinstall Ubisoft Connect/Uplay

If updating doesn’t work, try reinstalling Ubisoft Connect: To fix the uplay_r1_loader64

1. Open Windows Security → Virus & threat protection.
2. Click Manage ransomware protection.
3. Turn Controlled folder access OFF (temporarily).
4. Try launching the game.
5. If it works, turn it back ON and add ACU.exe to Allowed apps.

The most direct solution is to recover the file from your system's quarantine. Open Windows Security : Search for it in your Start menu. Navigate to History Virus & threat protection Protection history Identify the File : Look for an entry involving uplay_r1_loader64.dll Open Windows Security → Virus & threat protection

1. Close Ubisoft Connect completely (check system tray).
2. Go to C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\
3. Rename the folder to Ubisoft Game Launcher_old (as a backup).
4. Download the latest version from ubisoft.com/connect.
5. Install it (it will keep your game downloads intact).
6. Launch Assassin’s Creed Unity again.

Ubisoft Connect: Go to your Library, select Assassin's Creed Unity, click Properties, and select Verify files. The most direct solution is to recover the