I have a Lenovo tablet and it has an option to connect to internet via computer's network connection via USB. when i connect it to the computer via USB, a new network connection comes up named "Local Network Area Connection 3". I click on my computers network connection and check the "allow other users .." and something like that on sharing tab. then the local area connection network 3 shows "unidentified network" and when i troubleshoot it says that the connection does not have a valid ip address.