Kaspersky Rescue Disk 10 is a bootable CD containing a set of tools for efficiently detecting and eliminating computer infections. It is required when a computer is so damaged that the operating system or antivirus software fails to launch correctly. The ISO image includes up-to-date antivirus databases and configuration files.
However, creating and using a bootable USB rescue disk is a much faster, easier and smarter approach than a bootable cd/dvd. Kaspersky has released an official bootable USB disk maker for Kaspersky Rescue Disk.