My second computer does not have internet access enabled (I turn off the wizard and avoid clicking on IE). I only want it to communicate with the computer that does have a connection. Is that maybe why I'm having this problem? I have NICs installed and working in both machines--all light indicators show viable connections among machines and cable modem--sharing is enabled on both machines--folders have been marked to share--I have transferred files between both machines at the point where comp. 1 was not communicating with the modem--when I got the connection between the cable modem and comp. 1 going, I lost ability for either comp. to see the other. I have given only bits and pieces of info in my past posts. Hopefully this will be more helpful. I am not trying to be sarcastic with any of this. ...Maybe I just need to go with a router....?