lorjack

Open up a command prompt (Start > run > cmd)
Type the following bolded commands and post the results for each affected machine.

ipconfig /all

Note: To post results of commands, alternate click on the top of the command prompt > edit > select all >
alternate click on the top of the command prompt > edit > copy > paste in a message here. If you are on
a computer that can't connect to the internet then paste the contents in a text document and save it to a
portable media like a flash drive, then use an internet capable machine to post the contents.

Boot into safe mode with networking and see if you can get a connection.