By default ubuntu 12.04 comes with guest account.You can disable this account using the following procedure.Guest account is a paswordless account which allow users to get access to Ubuntu machine
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Previously my account on these forums was username Brighid. I made a mistake and created this new account not realizing I already had an Ubuntu One account (it's been a while). I saw directions in another thread to associate the old email with the new Ubuntu One account and I will try that to connect the other account.