I am using Ubuntu 10.04, and Windows XP on another drive, so i use dual boot. I just ran update manager on ubuntu and asked to reboot, so i rebooted. On the dual boot screen, i notice that there are two ubuntu OS options, one of which a newer version. How do i hide the older version off the dual boot screen? If i keep updating and this keeps happening, i will have a huge list of older ubuntus on the list.