This is possibly due to bug in Virtualbox. Install the latest version of virtualbox for your OS. Virtualbox is temperamental to installs and uninstalls, all trace of a previous version should be remove before a new version is installed. For an Ubuntu linux, this involves $ sudo apt-get purge virtualbox virtualbox-dkms $ sudo apt-get install virtualbox-5.1 Go to and download the latest version for your OS. For Ubuntu: $ sudo dpkg -i virtualbox-5.2_5.2.0-118431~Ubuntu~xenial_amd64.deb