![]() ![]() The resolution of the user interface of guest Windows 10 is automatically changed. Move the mouse pointer over the corner of the VM window, push the left mouse button and change the size of the VM window. In the VM Window menu, go to View and make sure that the Auto-resize Guest Display option is enabled. ![]() Once VirtualBox Guest Additions are installed, you can see a different set of resolution settings in the Windows 10 guest. After finishing the installation, reboot the VM. The process of installing Guest Additions is quite straightforward. In the guest Windows system open Windows Explorer, go to the virtual CD drive (disk D: in this case) and run VBoxWindowsAdditions-amd64.exe file to install VirtualBox Guest Additions on the Windows 10 guest. In the VM window, go to Devices > Insert Guest Additions CD image to insert the ISO disk into the virtual CD drive of the VM. In order to fix this issue and make VirtualBox full screen, you should install VirtualBox Guest Additions on the guest OS. If you try to enter the full screen mode by clicking View > Full screen mode in the VM window or by pressing the combination of the VirtualBox host key and F ( Right Ctrl + F in this case), the guest OS screen will not be stretched to the size of your display and resolution will not be increased. For example, in our case the resolution of the monitor is 1920×1080 and the maximum resolution in the Windows 10 guest settings is 1600×1200 (available resolution settings of the guest OS are not for widescreen displays, as you can see). If you go to Windows 10 display settings (right click the desktop and select Display settings in the context menu), you can increase the guest OS resolution, but you still have no ability to switch the full screen mode on. You can also enable 2D and 3D acceleration. It is recommended that you set 128 MB of video memory, as when a video mode with higher resolution is used, more video memory is needed. If you try to maximize the VirtualBox VM window right after installing Windows 10 on a VirtualBox VM, the size of the guest OS user interface is not increased (see the screenshot below).Ĭheck the amount of video memory you have in the virtual machine settings. As you recall, VirtualBox is installed on the host OS running on a host machine (a physical machine) and the guest OS is the operating system running on a VM. ![]() You can disable the internet connection or set up a virtual network adapter for a VM in the Host Only mode to allow network communication only between host and guest systems, and deny connecting the Windows 10 guest to external networks, including the internet. If security is a concern for you, running Windows 10 as a virtual machine (VM) on VirtualBox is a good idea. Without these it is running well, so I don't want to change anything on Guest side.DISCOVER SOLUTION How to Make VirtualBox Full Screen for Windows 10 Guests It does not work if I install Guest Additions. The app I'm running in Win XP is really fragile and it seems anything can break it. ![]() Maybe there is any other tool to "super maximize" a window? The idea was to run it on Win 10 to "super maximize" VirtualBox window. But, it is "tested on Windows XP" and has an issue "ignores taskbar", so I guess it's not what I need. It is a program which hides window title similarly to how browsers do when you press F11. While googling, I've seen winsupermaximize mentioned. The closest to this is Scaled mode: the viewport is scaled ignoring aspect ratio ( which is what I want), but it has the window title on the top of the screen and taskbar on the bottom ( I don't want neither of these). I don't want Guest OS to think it has a 1920x1080 viewport (as it would if I'd install Guest Additions), I want it to stretch 800圆00 viewport onto 1920x1080 screen. I want it to behave similarly to normal fullscreen apps, which stretch their viewport ignoring aspect ratio. In "fullscreen" mode the whole screen is black and there is a small 800圆00 viewport in the middle. ![]()
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