The top menu is wrong (Virtualbox 4.2, Windows 7)
Shows: File, Machine, Help
Expected: File, Machine, Devices, Help
Super User is a question and answer site for computer enthusiasts and power users. It only takes a minute to sign up.Sign up to join this community
Please update to the latest version of VirtualBox, version 4.3.26. The Devices menu will normally only be shown at the top of the virtual machine window when a virtual machine is running. You can also also use the keyboard shortcut to insert the Guest Additions CD. By default, to do this, hold down the Ctrl key on the right right of your keyboard, and hit the "D" key.
I faced the same issue with MAC host and Ubuntu guest. Finally, I found this:
Go to preferences.
Select "input"->"Virtual Machine" Add shortcut key to "Menu Bar Settings" (I added HOST key + M)
In the VM respective machine (Ubuntu 20.04 LTS) General / User Interface must be selected Device like others tabs (File Machine etc Help) and in each one select what you want (Insert Guest Additions CD Image) The you will see the CD and from there install the additional modules with: sudo ./VBoxLinuxAdditions.run