: If SFC doesn't work, use the Deployment Image Servicing and Management (DISM) tool. Run DISM /Online /Cleanup-Image /RestoreHealth in an elevated Command Prompt to repair the Windows image. Windows Updates : Many DLL errors (like api-ms-win-crt-stdio-l1-1.0.dll ) are fixed by installing the latest Windows Updates 2. Manual Reinstallation If the error occurs with a specific game or application: Reinstall the Program