zBoot Manager is an effective boot manager which allows you to easily install and use multiple operating systems on a single hard drive. It supports most types of systems such as DOS, Windows, and Linux, and you won't have to reinstall the system you're using right now. You'll be able to install up to eight operating systems, which may have up to four partitions each. It eliminates the need for FDISK and directly setup 32 primary partitions with the built-in utility. Once set-up, the program displays a menu whenever you boot up, you simply select an operating system to run it on your computer. For security, selected systems may be password protected.