I've got the same error.i've got 25 updates to install, but not even
the first one will install.its been now for over 3 weeks that i'm
trying to install it.and everyday I shut down my domputer until the
next time i want to start it.I didnt shud down while installing etc, I
have 23 gig left so its not y memory thats the problem.and i'm using
the correct username and password to install.