I have Centos 7 running on Virtualbox. There we no major software installations but I after a reboot I find myself with a desktop that does not show a wallpaper, the top and bottom taskbar/panels or the mouse cursor(its invisible but one can right/left click). The desktop seems to be messed up. At the login screen I do see the mouse cursor, post login is when the issue is occurring.
I tried my other Kali and Centos7 VM's and everything shows correctly, so it does not look like its a Virtualbox issue.