I downloaded VirtualBox from ubuntu software center and install there windows XP 32 bit. Now when I'm trying to install guest additions it's saying that guest addition is missing and is asking download it. When I press 'download' it's saying that it can't download because the link is missing.
Open the console, and run the following command:
Start the virtual machine (e.g. Windows XP)
What worked for me on Ubuntu 19.04:
You have to download guest additions from ubuntu Software Center as well if You have gained VB from USC. however it is highly recommended to download Virtual Box, Guest Additions And Extension Pack directly from Oracle website, as it is newer version.
guess additions has been moved in VirtualBox 6, now the command is: