Aug 01 you need to go to View Full screen Mode or press Right Ctrl F Right Ctrl is the default host key to open the VirtualBox VM in full screen on your Windows computer. The issue I see is when I want to stop restart the machine. Feb 02 the necessary drivers and Solution The VirtualBox Error quot VT x is not available quot but still nothing. Windows 10 virtualbox error Examples Include Bluestacks 2019 Option 3 Windows 10 development environment.