At least 20 people posted this problem to this group today (including me).
I think yesterday's XP critical update turned off NetBIOS over TCP/IP. I
got my system back up and running by turning it on again - see
http://support.microsoft.com/default...b;en-us;318030 if you need
help.
"R. Magnuson" <(E-Mail Removed)> wrote in message
news:2e4401c374b7$9356c3c0$(E-Mail Removed)...
> The referenced Security Update for Windows XP Home was
> installed automatically. Now I cannot connect to other
> computers or printers on the peer-to-peer network nor can
> other computers connect to me. The firewall was enabled
> before this update and there was no problem.