This is the most common fix. Windows Defender often flags game files as false positives and moves them to quarantine. Open (search for it in the Start menu). Go to Virus & threat protection > Protection history .
C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\games\Far Cry 4\bin C:\SteamLibrary\steamapps\common\Far Cry 4\bin how to fix far cry 4 uplay-r1-loader64.dll missing
Most players find the missing file is actually still on their computer, just hidden in quarantine. Open (search for it in the Start menu). Go to Virus & threat protection . Click on Protection history . This is the most common fix