Just a note.
I know that my cable modem has a real issue with anything connected before it has the chance to boot fully. If I had a computer hooked into the modem, directly, I wouldn't be able to boot the computer until the modem was booted. When my router is hooked up, I have to wait for the modem to boot completely before booting up my router (in this case, I can have the computer booted because the modem does not see it directly).
Please post the results of ipconfig /all on your next post.