Bus 429
Had exactly the same problem last night!
Spent over an hour going through the norton-symantecs sites.
I then decided to check my firewall, zone alarm!
Opened it up went to program control. norton anti-virus. Put ticks in the access & server boxes! Tried again & downloaded all the updates!
. Not saying this is your problem, but if you have a firewall check the settings..
regards nooluv.......