One of the great benefits of virtualization software, such as VirtualBox, the ability to clone an installation, use it, then remove it. Personally, I keep a backup of the original installation, up to date and loaded with common software. When I need a new machine for testing, I clone the original, reinitialize the MAC addresses, and get to work.
Unfortunately, a cloned machine will act as if it was never authenticated, since the clone process asssigns a new machine UUID. Thankfully, there is a simple workaround,
