Blancco Drive Eraser (or Blancco 5) have their own Operating System. The software itself is booted by using USB or CD. There is no need to have any OS pre-installed on target machine (i.e Windows, Linux). Please refer manual page 10: "Minimum System Requirements" to see all system requirements for running Blancco 6.
Note! Blancco Drive Eraser erases the computer's hard drive(s) and leaves no data behind. If you want to start using the computer again, a new operating system has to be installed.