If the update failed you will need to back up the. vbox file in your virtual machine’s home directory now contains the line VRAMSIZE=”256″. Vboxmanage.exe modifyvm 'Your VM Name' -vram 256 Go to your VirtualBox directory and enter,.You need to increase this to the maximum permitted 256 GB. The slider in the UI only goes up to 128 MB but this is not enough to reliably support scaling in the VirtualBox client.

To fix this permanently you will need to make several changes. The problem is that sometimes the VirtualBox guest does not detect the monitor properly and either it fills the screen but everything is so small I cannot see it (I assume it is picking up the ultrahigh resolution of the Surface Pro) or the whole guest screen appears as postcard in the middle of the monitor. I want to my Windows 10 virtual machine to run full screen on the 24″ monitor which is 1900 x 1200 pixels. I have a Microsoft Surface Pro 4 laptop and although it is a very high resolution screen it is only 12″ big so I do most of my development on a second 24″ monitor.

Virtualbox windows 10 full screen