Computer can't connect through cable modem - ethernet

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I'm working on my step sister's computer. The network hardware states: Intel Pro/100 VE Network Connection and im using a motorola cable surfboard modem. it'll connect through usb, just fine. but when i connect it via ethernet, it won't connect. the local area connection states it's connected at 100Mbps, and packets are sending, but nothing is being received. When i go to "add hardware" (when reinstalling the drivers) it shows the SM Bus Controller as installed, but the drivers are apparently missing. what could be going on here?

 

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in the USB LAC status, it says Address type: assigned by dhcp and it gives me a default gateway number. under the ethernet connection the address type says automatic private address with no gateway number

 

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the SM bus controller issue, i fixed.