A note: I am UTTERLY illiterate concerning networking (and English is not my mother tongue), so if someone knows how this problem can be solved, I will be thankful if you use as simple words as possible. 
A week ago I got Conexant router (4*ETH+1*USB). It was already configured, the only requirement was that I must set LAN connections in all of my computers to "automatic IP" (and whatever else that goes with it - everything must be "automatic"). I connected it via USB and it works perfectly.
Now I wanted to add two more computers, both of a new generation and having LAN ports, drivers and connections. I've heard that you can't have USB and ethernet simultaneously, but the manual of the router claimed I can have them, so I connected my laptop with the router via ethernet cable. The laptop didn't recognize anything, it couldn't activate the "Quick setup" option on the CD I got with the router (so I couldn't do the online confirmation), and FURTHERMORE: my main PC (the one that's connected via USB) lost connection that very moment; even the icon in its "Internet options" dissapeared. I had to unplug everything and reinstall USB. The same happened when I tried to connect the other computer.
Then I deinstalled USB from my PC and tried to connect it via ethernet (it also has ethernet port and LAN-ethernet connection created, so I guess it fullfills all the requirements). The lights on the router were showing that everything was OK, but of course it wasn't. It didn't work at all.
Then I tried to apply "repair the connection" option, and it failed, saying that it couldn't create my IP address. I have no idea what it means, but obviously something's wrong. Though again, can it be THAT wrong that I can't connect none of the three computers via ethernet? A damaged cable is out of question, for I tried two different cables (of the same type, of course), just in case. I suspect it could be something with IP adresses, but I don't dare to touch anything, because both the manual and the local provider insist on "automatic IP", and that's how I set them. Also I don't dare to touch the configuration of the router. The technical support is slow and I get information in pieces, and somehow I doubt they will manage to help much.
IF someone knows how to solve this... and explain it to me (the worse part of the task, I suppose)...
THANKS!
A week ago I got Conexant router (4*ETH+1*USB). It was already configured, the only requirement was that I must set LAN connections in all of my computers to "automatic IP" (and whatever else that goes with it - everything must be "automatic"). I connected it via USB and it works perfectly.
Now I wanted to add two more computers, both of a new generation and having LAN ports, drivers and connections. I've heard that you can't have USB and ethernet simultaneously, but the manual of the router claimed I can have them, so I connected my laptop with the router via ethernet cable. The laptop didn't recognize anything, it couldn't activate the "Quick setup" option on the CD I got with the router (so I couldn't do the online confirmation), and FURTHERMORE: my main PC (the one that's connected via USB) lost connection that very moment; even the icon in its "Internet options" dissapeared. I had to unplug everything and reinstall USB. The same happened when I tried to connect the other computer.
Then I deinstalled USB from my PC and tried to connect it via ethernet (it also has ethernet port and LAN-ethernet connection created, so I guess it fullfills all the requirements). The lights on the router were showing that everything was OK, but of course it wasn't. It didn't work at all.
Then I tried to apply "repair the connection" option, and it failed, saying that it couldn't create my IP address. I have no idea what it means, but obviously something's wrong. Though again, can it be THAT wrong that I can't connect none of the three computers via ethernet? A damaged cable is out of question, for I tried two different cables (of the same type, of course), just in case. I suspect it could be something with IP adresses, but I don't dare to touch anything, because both the manual and the local provider insist on "automatic IP", and that's how I set them. Also I don't dare to touch the configuration of the router. The technical support is slow and I get information in pieces, and somehow I doubt they will manage to help much.
IF someone knows how to solve this... and explain it to me (the worse part of the task, I suppose)...
THANKS!