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Ethernet" doesn't have a valid IP configuration

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Ethernet" doesn't have a valid IP configuration

Problem: intermittent no internet connectivity
Running network troubleshooter gives me the error message: "Ethernet" doesn't have a valid IP configuration on my laptop.  When I plug in different laptop it works fine.  What could be issue?

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Re: Ethernet" doesn't have a valid IP configuration

I rent model CGM4140COM from Xfinity.
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Re: Ethernet" doesn't have a valid IP configuration

same problem same rented modem...