ARF files are Advanced Recording Format files created by Cisco WebEx, containing recorded video and audio from WebEx meetings. To open an ARF file on Windows 10, you have several options: Using WebEx Player: The most straightforward method is installing Cisco WebEx, which includes a built-in ARF player. Download WebEx from Cisco's website, install it, then right-click your ARF file and select "Open with" → choose WebEx Player or Cisco Recording Editor. Using Cisco Recording Editor: This dedicated tool lets you play, edit, and convert ARF files. It's available as a free download from Cisco's support website and works as a standalone application. Converting to Another Format: If you want to use a different media player, consider converting the ARF file to MP4 or another common video format. Online conversion tools or video conversion software like VLC (with appropriate plugins) may handle this, though quality and compatibility vary. Checking File Properties: Right-click the ARF file, select Properties, and verify it's indeed an ARF file. Sometimes file extensions can be misleading. Troubleshooting: Ensure you're using a recent version of WebEx, as older versions may not support all ARF formats. If WebEx doesn't recognize the file, try the Cisco Recording Editor instead. Some very old ARF files may require legacy WebEx versions to open properly. For technical support, Cisco provides documentation on their website with detailed instructions for different scenarios.