But, be careful about resizing the VM again using the guests display properties. This should make it happy to accept other 16:9 ratios.Īs a test, it should now be possible to go fullscreen, or to use seamless mode without artifacts. We want windows to start up, seeing a 16:9 ratio while booting up. Shut down the VM completely (not suspend), then restart it.You are trying to achieve a 16:9 ratio, so with a 1280 display width you want a display height of 720, exactly. Carefully drag the bottom edge of the VM window to reduce the screen height.If they are installed then there should be an icon on the guest taskbar which will tell you the GAs version and status.

Make sure that the Guest Additions are installed, not merely having the GAs CD mounted.Make sure that View|Auto resize guest display is enabled (checked). switch to your windowed 1280x1024 mode (or whatever windowed mode suits you). First, make sure you are not in fullscreen mode: i.e.This constraint is now stored in the windows registry somewhere, so you need to go through a few hoops to get around it. The problem is that your Windows guests think that the virtual monitor is 4:3, so they are helpfully disallowing any display modes that use a widescreen ratio. I'm guessing that 1024 is close to the full height of your display. It would be nice to know its display size. Though you have not said so, I'm going to guess that your host PC has a widescreen monitor. If yes, then I had that problem with VirtualBox 4.3.12, so really this is not a VBox version issue. Do you actually mean that you can resize, but you can't go larger than 1280x1024?

Windows 10 virtualbox screen resize