Modern antivirus software—including Windows Defender—is often overly aggressive. It may flag steam-api64r.dll as a "false positive" and move it to quarantine, effectively "deleting" it from the game folder. Open your Antivirus or Windows Security settings. Navigate to Protection History or Quarantine.
Run Steam.exe; it will force-reinstall the client and refresh all core API files. ⚠️ A Note on Third-Party DLL Sites call of duty infinite warfare steam-api64r.dll missing
Delete everything except the steamapps folder (where your games are) and Steam.exe. Navigate to Protection History or Quarantine
DLL errors are frequently linked to outdated system libraries. Infinite Warfare relies on specific C++ environments to run its scripts. DLL errors are frequently linked to outdated system
Restart your computer after installation to ensure the changes take effect. Reinstall the Steam Client
If you're still having trouble, I can help you dig deeper. Just let me know: Are you using a or a specific firewall ? Did this happen after a Windows update ?