so are both computers hooked up with the router? if so and if they're under the same domain (why do u need a domain?, have a workgroup) they should be able to see each other. did u set up the router so that both connects to the internet? that might be neccessary cause the router is supposed to give an ip to the computers, though there might be a work around. and why not just share the internet. I mean if the other comp is not going to use it, it shouldn't be a problem (won't slow the other computers' internet) right click on my comp go to properties go to computer name press change type the workgroup name to change the workgroup...(or domain)