I'm running Win7 on my laptop (Pavilion), wireless; have access to internet & my home server. My desktop (Acer) is running Vista; network printer is connected to desktop; the desktop machine can access the internet, and my laptop, and my home server. From my laptop I can ping my desktop by IP, but not by name; if I try to open the desktop I get "Windows cannot access //desktop"; Win7 diagnosis does not resolve the problem. My router lists both the laptop & the desktop--both by IP and by computer name--in the LAN list. I usually use the built-in wireless in my laptop, but sometimes use an N-band USB wireless adapter, disabling the built-in; I notice that in the router LAN list my laptop is listed twice, with the same name, but different IP addresses. I don't know if this is related to my printer access problem, or not. From my laptop I CAN access the desktop's Media Server, which shows up in 'Network & Sharing Center" & the Nework Map ; but although my desktop is on the map, I cannot access it. I have turned off both firewalls, rebooted both computers, checked all the cables, rebooted the router, and triple checked desktop name and workgroup; nothing works! I am baffled ...but I need to access my network printer (and would like to be able to access the shared folders on the desktop). Thanks for any help!