I am trying to update,via update mgr. the update mgr screen shows 22 updates avail for computer. I check and click on "install updates". I then get a screen saying, authenticate, so I enter my pswd; the update screen goes to a shade of blue ; then another screen comes up saying "requires installation of untrusted packages", ok ,so I click close because alll the updates are ok, the screen goes right back to the initial screen of update manager ". Im going in circles trying to allow the updates to be installed. What am I missing ?
using Ubuntu 12.
Thanks, and have a good day.