Virtualbox USB issues

After moving Virtualbox images to a new machine you'll probably have an issue with USB.  To solve it you'll need to add the current user to the "vboxusers" group.  Tricky, if you're using LinuxMint 12 and above.

You could add yourself to "vboxusers" (assuming the group already exists) by simply doing the following:

sudo gpasswd -a altair vboxusers

Or perhaps:
sudo apt-get install gnome-system-toolssudo gedit /etc/group
Then search for the "vboxusers" group and add your username to that line:
vboxusers:x:125:yourusername

Failing that you could always install the old "Users and Groups" utility:
sudo apt-get install gnome-system-tools
You'll find the utility in the "Administration" group menu.