I have been freaking out I can't figure this out. I have two computers that connect in to a network hub an then in to my cable modem yeah. One computer works and the other says something like connectivity limited or something. The ed up part is even if I just plug the other computer right in to the modem it still says the same thing can anyone please help me I have been trying to figure this out for about 3 days now I don't understand! Is there something I'm overlooking?

I tried renewing my IP address but some stupid error came up an I called my internet comcast anthey were no help an wasted 2 hours of my life telling me to unplug an plug it back in an all this crazyness can someone HELP! Pleas!!

Try this, on one not working
Click on tools, internet options, connections tab and then click on LAN settings
Uncheck everything and click OK, try to get online again

Provide me more information. It'll make it easier if you give me the following info about each computer:
PC name
OS type

Then on each one, assuming they are a Windows OS:

1. press the WINDOWS key and the letter R
2. type "CMD" and press enter (don't type the quotation marks)
3. type "ipconfig /all" and press enter
4. tell me if the line that says "DHCP enabled" says "yes"
5. tell me what is in the line that says " IP Address"

Have you logged into your cable modem and made sure that it is set up with DHCP enabled for the LAN?