All VMs are kept during the upgrade or when you uninstall VB.
Note: After upgrading Virtual Box it is recommended to upgrade the guest additions as well.
This can be done by running the installer and follow the on screen instructions.
and local applications without the overhead of using a full server environment, Oracle VM Virtual Box runs on standard x86 desktop and laptop computers.
It allows users to set up multi-platform virtual machine environments for software development, testing, and general purpose operating system (OS) virtualization, with optional runtime encryption.
The Virtual Box User Manual is included in the Virtual Box binaries above.
If, however, you would like to take a look at it without having to install the whole thing, you also access it here: You may also like to take a look at our frequently asked questions list.