Hiren's BootCD is a popular, free, and open-source bootable CD that provides a comprehensive set of tools for troubleshooting, repairing, and maintaining computers. The latest version, Hiren's BootCD 13.1, is a powerful utility that can be used to diagnose and fix various issues with Windows and other operating systems. This feature allows users to download the Hiren's BootCD 13.1 ISO file, which can be used to create a bootable CD or USB drive.