the password thing sounds odd and indicates MALWARE.
as for the updates thing, the messages are fine
each update is installed, but some require the additional
configuration at next start up so thats fine.
whats wrong is there are a number of microsoft updates that go wrong
resulting in the system, closing down and trying to implement the updates again.
this loop is tricky to get out of.
you cant restart into windows to get access to your stuff as the pc is
stuck in a loop microsoft never intended you to have the option of aborting
you need help from microsoft
there may well be an error code you are not mentioning.
if you can press F8 and break out of it by using last known good
then do that.