I am new in this kind of environment and I want to learn this. This is started once I install VirtualBox-5.2.18-124319-Win and successfully installing ubuntu-18.04.1-live-server-amd64 in that virtual machine, however in the instruction command me to install VBoxguestaddition, and I get this kind of error, eventhough I have 2 installations of VBoxguestaddition and VBoxGuestAdditions_4.3.20 in .iso;
Could not mount the media/drive 'C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso' (VERR_PDM_MEDIA_LOCKED).
Result Code:
E_FAIL (0x80004005)
Component:
ConsoleWrap
Interface:
IConsole {872da645-4a9b-1727-bee2-5585105b9eed}
Callee:
IMachine {85cd948e-a71f-4289-281e-0ca7ad48cd89}
I tried use sudo command in terminal sudo mount /dev/cdrom/media/cdrom and not succeed, I ask my friend and lecturer but no one give a proper advice. Thank you in advance. 