Run the installer to reinstall Steam. This replaces missing core system links without deleting your installed games. 5. Update Graphics Drivers and DirectX
Right-click on and select Properties .
This is the #1 verified fix because Steam automatically restores the missing DLL.
Open your antivirus software (e.g., Windows Defender) and navigate to Protection History Quarantine steam_api64.dll or anything flagged in the Black Ops III folder. Select the file and choose : Add the game's installation folder to your antivirus Exclusion List so it doesn't happen again. 2. Verify Integrity of Game Files (Steam)
Run the installer to reinstall Steam. This replaces missing core system links without deleting your installed games. 5. Update Graphics Drivers and DirectX
Right-click on and select Properties .
This is the #1 verified fix because Steam automatically restores the missing DLL. Run the installer to reinstall Steam
Open your antivirus software (e.g., Windows Defender) and navigate to Protection History Quarantine steam_api64.dll or anything flagged in the Black Ops III folder. Select the file and choose : Add the game's installation folder to your antivirus Exclusion List so it doesn't happen again. 2. Verify Integrity of Game Files (Steam) Run the installer to reinstall Steam