I recently added a Windows 7 Professional computer to my home network. The other PCs are still running in XP SP3. The new W7 computer can communicate one way with the XP computers fine (retrieving files and printers); however, even though I believe I have filled all the "sharing" blocks on the W7 computer, the XPs do not find either the printers on the W7 computer or the C drive. They only find "Default" & "Public" users going from the XP to the W7! Where did I miss something?