If all else fails, the DLL may be missing from the game’s own install_scripts folder.
The error in Call of Duty: Black Ops 3
Before fixing the issue, understand what broke it: --- Call Of Duty Black Ops 3 The Additional Dll Could Not Be
: To prevent the file from being deleted again, add the entire Call of Duty: Black Ops 3 installation folder as an exclusion in your antivirus settings. 2. Verify Game File Integrity (Steam Users) If all else fails, the DLL may be
: Windows Defender or third-party antivirus software often flags essential game DLLs (like SLF64.dll or Steam-related files) as false positives and deletes them. If all else fails