The problems I have are:
a) The PC with the laserjet printer and scanner attached cannot access any of the other 3 computers to share files, however 2 of the other 3 computers can access the printer and scanner through this computer. The error message is "cannot access computer2 (and 3), you may not have permission (or similar)".
b) The 4th computer, running W98, cannot see any other computer on the network but as it can access the Internet the problem is probably just configuration. I'm really out of my depth with DNS numbers and other such settings. I got the Internet to work on this PC by manually adding the IP address assigned by the router.
c) On each computer the wireless network says its speed is 54mbps. So what happened to the 108 it's supposed to be capable of? The PC's near the router have a strong signal at about 48mbps but perhaps they could attain 90+?
Any help truly appreciated.