Comment 6 for bug 988841

You may mark this as solved. All I had to do was find every file that had been changed as described previously and delete all of its contents and then run update-manager again and it worked. I am sorry if I seemed flustered; it was unintentional if I came across as such. I don't know what caused this issue, but I think update-manager did something wierd when it tired to look for updates and was intercepted by the login prompt.