As a virtual machine environment user, I regularly create ‘base’ images of machines that I can reuse . So when I need a new machine, I simply create a copy of the virtual disk and add any additional software I need, this save me a lot of time instead creating new virtual environments.
In VirtualBox, copying a virtual disk is a bit of a pain. If you copy the disk in Windows Explorer and try and use it in a new VM, VirtualBox will have a display an error shown below.