А для чего VirtualBox OSE использовать? Можно же и с офф-сайта скачать, она лучче 
Я как то не в курсе, устанавливал через апт... А в чем отличия OSE?
p.s. нашел в чем отличие...
"Closed-source features ¶
The following list shows the enterprise features that are only present in the closed-source edition. Note that this list may change over time as some of these features will eventually be made available with the open-source version as well.
* Remote Display Protocol (RDP) Server
This component implements a complete RDP server on top of the virtual hardware and allows users to connect to a virtual machine remotely using any RDP compatible client.
* USB support
VirtualBox implements a virtual USB controller and supports passing through USB 1.1 and USB 2.0 devices to virtual machines.
* USB over RDP
This is a combination of the RDP server and USB support allowing users to make USB devices available to virtual machines running remotely.
"
понятно, почему VRDP не работает