In this tutorial, I will show you how to install dual boot in VirtualBox. There are two techniques in this installation. The first technique is that you install Windows
first then Ubuntu and the second technique is that you install Ubuntu first then Windows. Since you are using Virtual Box, you don't have to worry that your laptop or PC would be broken or something else (the worst case). This tutorial will be help you in the future, if you want to install
real dual boot in your laptop or PC.
Dual Boot is a phenomenon of having two OSes in a laptop or PC and starting an OS that chosen when the boot menu is up. It's like installing two OSes in our laptop or PC. The purpose of Dual Boot is that if you want to utilize two different or same OSes optimally in your laptop or PC. You get many benefits from dual boot in your laptop or PC, such as using alternative OS (when one fails to start), exploring others features in another OS, working with another platforms, and etc. Since dual boot has many benefits for us, let's try to install dual boot in VirtualBox in the case of practicing.
For the complete tutorial, see this link below: