Drawbacks of multibooting

Multibooting requires separate partitions on your computer's hard disk for each operating system. If you're running one operating system, you can't run a program installed on another operating system. You'll need to install programs on each operating system that you want to use them in. You must restart your computer each time you want to switch to a different operating system.

You also need to install the oldest operating system first, which can be frustrating if you want to add an earlier operating system (for example, you're currently running Windows 7, but you want to add Windows Vista or Windows XP).