SPOILERS: Working Robots During Up-link?

Rating: Null/10 (22 July 2004)

SPOILERS BELOW!!! BEWARRRRRRRREEEEEEEEE!!!!
i thought that when the robots are connected via the up-link, they had limited capability? isn't that what the chick said when Spooner went to see her at her home and the NS-5 was downloading content? but at the end of the movie, all the robots were running around while connected to the VIKI server thing? i was confused. Also, when Viki said that they are prepared to sacrifice a few people for the higher cause? that didn't make sense because they would break one of the laws which meant hurting humans. i understand that the three laws can result in the 'creation protecting the creator' but i don't see how that evaluates to them attacking humans? the laws are HARDWIRED into the robots, even VIKI couldn't control those by linking with the robots.