Go to your Steam installation folder (usually C:\Program Files (x86)\Steam).
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
Download the latest DirectX End-User Runtime from the official Microsoft website. Go to your Steam installation folder (usually C:\Program
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. call of duty infinite warfare steam-api64r.dll missing
Look for any files related to Infinite Warfare or "steam-api64r.dll."
Avoid downloading steam-api64r.dll from "DLL fixer" websites. These files are often: Outdated versions that cause crashes. Bundled with malware or miners. Incompatible with the current Steam API version.