happen because Windows Security or third-party antivirus software mistakenly flags the file as a threat and "quarantines" it. Open > Virus & threat protection . Click Protection history .
Typically found within the main installation directory of the game (e.g., C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\games\Assassin's Creed Valhalla ) . assassin 39-s creed valhalla uplay r2 loader64.dll