You no longer need to uninstall this software on Windows in order to update VirtualBox to the latest version. Now you can install it for free - and do it over the current version. Download the latest version for your Windows by just opening the About page of the program. Download the installation file to start the process. VirtualBox will automatically remove the old version from your computer in the background mode while installing the latest version of the program. Only if the installer fails to remove the older version, you will have to uninstall it manually.