Today I’ve updated my VirtualBox to version 4.1.16-78094. When I tried to install the new version of Guest Additions, I got the error message
Unable to mount the CD/DVD image 'C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso' on the machine. Would you like to force mounting of this medium?
Could Not mount the media/drive 'C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso' (VER_PDM_MEDIA_LOCKED)
as you can see in the picture 1 bellow Continue reading “How to solve Cannot install Guest Addtions: VERR_PDM_MEDIA_LOCKED”