I have three desktop PC's on a local LAN, all wired connections. There are also three laptops with wireless connections and one which is wired. I'm using a router as part of my internet connection.
I upgraded to Norton Internet Security 2011 from 2010 on my main desktop and two of the laptops. Since installing NIS, I have not been able to access the two laptops, except using TightVNC. However, my desktop is accessible from other computers, including the two laptops. When I ping the laptops, the request times out. I don't see them listed when opening the Network folder. Before installing NIS, everything was normal. It doesn't appear to be a DNS issue, since neither names nor IP addresses work. I then tried uninstalling NIS on one of the laptops and regained access. When I reinstalled, it was back to square one. All of the computers listed in NIS are at the Trust/Shared level.
Any ideas, short of uninstalling the program on the laptops?
Thanks.