I do not think it is a driver or hardware problem because arp and smb traffic flows between the problematic computers. The problem is that those computers do not seem to be receiving the packets (as network monitor on the NT machine shows).
Yes the ip addresses of the adapters are static.
The network has only one hub that all the computers are connecteed to.The adapter and hub lights are all on solid and pass diagnostics.
The only shared windows resources I see on the problem coputers are their own.
As I said, the problem is not in the hardware because when i try pinging a computer, an arp request is broadcast. The problem stems from the fact that the arp responses from other computers are ignored.