I have a new hp desktop running vista, which connects fine to the net when using the ethernet cable from the modem. I would however prefer to run the ethernet cable to a router, and when I try to use the usb cable connection to the computer it will not connect to the net.Even after running the full installation wizard it says unable to connect...check connections etc. Again it is fine using the ethernet connection.
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First try connection the Yellow ethernet cable from the rca modem to your computer's network connection. If you get a connection this way, then your modem will work with a ethernet cable. If not, then call Comcast for help. The modem ethernet out to computer port must be connected to the wan line of the router. Then you can connect an ethernet cable from your computer network connection to one of the 4 ports of the router. For wireless connections you must set up the router and wireless adaptor with the same settings to connect. Follow the routers directions.
The easiest solution would be to use an ethernet connection. A second problem is probably on most cable modems you can either use a USB connection OR an ethernet connection you cannoot use both at the same time.
I'm not an expert in window based units but since it worked with Vista OS and not with XP. Sounds like you might try re-installing XP again. Take note on any windows that refer to the ethernet port during installation. It is likely you might of hit "next" without reading all the text. I know I have in the past. I changed over to mac and I know longer have any problems only at work but give then I give it to the IT Dept and wait and wait and wait.
OK. First of all you do not need a special or seperate driver for the Ethernet port. Its factory loaded with your OS.
All you need to do is plug the Ethernet cable into the LAN port on your HP Desktop and then into the LAN port (not the WAN port) of your cable modem.
The second thing is if its only a cable modem, then I suggest you proceed with caution as there is NO built-in firewall on a cable modem. Yes you will get on the net, but you are likely to be attacked with virus the moment you connect. I suggest you check very carefully whether the cable modem (if that's what it is) does/does not have a firewall as you would be very unwise connecting up like that.
Next, forget USB connection to the router/cable modem. That technolgy we've moved on from.. Your Vista shodul be 'plug n play' adn should configure the router for you. obviously that bit isn't so slick on yours.
FYI for those people trying to use a ethernet and usb cable from a cable modem - it may work for a while but it won't work forever - your ISP will only allow one IP address out of the modem unless you pay for additional addresses (then you need a switch). Each device you have on the modem is fighting for that IP and eventually it will just quit working (if it works at all).
If you want more than one computer on your network (on the Internet or sharing printers/files, etc) then you need a router or a gateway (cable modem/router combo which I DON'T recommend).
Your computer is attempting to find the network connection through your LAN port. Your best bet is to reconfigure your network settings to seek its external network connection through USB, or better still, obtain a router(I personally recommend linksys wireless/basic routers due to stability), and simply use the ethernet connection through it. While this is bypassing the initial issue, it is also saving yourself a lot of hassle when it comes to retooling the PC's settings on the USB connection.