Re: limited or no connectivity...
Power-cycle the modem before you hook it up to your old computer with the fresh install. Limited connectivity means that your network card is asking for an IP address, but nothing will give it one, so it assigns itself an IP address, and gives you that message. If you can just jump online on the other computer as soon as it's hooked up to the modem, try the suggestion before you go back to the one your getting the error with.
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