To be able to use VirtualBox on Multiple Monitors with any virtual machine, you need to change the default settings. If you have a dual monitor setup and you want to use both screens with your guest ...
Assuming you mean on Virtual Server 2005, edit the config of a Virtual machine via the web interface, choose the "Virtual Mahcine Additions" option, it's the 2nd option on the list, and check the box ...
If you cannot open the guest session and get a VERR_NOT_FOUND VirtualBox error, follow the tips, solutions, and workarounds mentioned below. Check if “VBoxGuestAdditions.iso”n exists Insert Guest ...