
When installing Guest Additions on Oracle VM VirtualBox 20.04, I ran into some challenges.

(If this did not go well for you, please keep reading.) Change the machine window size to check if automatic adjustments are made properly. If everything goes well, you will be prompted to run the installation and restart your virtual machine. To install Windows Guest Additions, mount the Guest Additions ISO file by clicking the Devices dropdown menu and selecting the Insert Guest Additions CD Image menu item. Installation can be easy if you do not run into error messages, which I did. The most notable feature is the ability to resize the machine’s window and automatically adjust the screen resolution.

There are many reasons to install Windows Guest Additions for Oracle VM VirtualBox: mouse pointer integration, enable shared folders and clipboard, optimal video support, as well as generic host/guest communications.
