What to do when Virtualbox doesn't release your mouse
January 28, 2019
Virtualbox sometimes won't let go
Just minutes ago, I was installing Debian as a Virtualbox guest on a Linux Mint host when I noticed that I couldn't get my mouse cursor to move out of the box containing the Virtualbox guest.
Even having guest additions installed didn't prevent Virtualbox from not releasing my mouse, even when I pressed the right Control key, the default button used to release the mouse.
The solution
The solution that I found on the Ubuntu Forums was to simply press the Host Key, also known as the "Windows Key" as it's a key that often has a Microsoft Windows logo on it.