I was worried about the win 2000 server at work, but it was set on autoupdate, so it seems ok.
We have a bunch of win2000 desktops that we took off the network a week before the ms blast problem started. We'll have to be careful when we reconnect.

I updated the xp laptop (home edition), which didn't have a firewall, but I updated norton before I connected to the net.

Norton caught and quarantined msblaster halfway through the first of 40 updates. I was able to complete all the updates.