Once the installation and configuration are complete, you can start the virtual machine by selecting it in the VirtualBox Manager and clicking on the Start button.

You can now use the virtual machine as you would with a physical machine by installing applications, accessing the internet, and performing tasks specific to the operating system.

The nice thing about using a virtual machines is that you can take snapshots of the virtual machine's state at various points in time. This feature is particularly useful when testing programs or performing potentially risky actions. If something goes wrong, you can revert back to a previous snapshot and start over, saving time and effort.