So, I have a problem which usually can be solved just by googling, but after hours of googling and doing the instructions, I couldn't solve it.
I installed 64bit Kalilinux 2017.3 inside my Virtualbox 5.1.22 and as usual, I wanted to go fullscreen, so I install the guest addition, which is version 5.1.22), and I rebooted the machine, however it doesn't go fullscreen.
Please help me resolving this issue.