Having trouble with one computer on my network. I have 4 computers in the network, 2 desktops, and 2 laptops. 3 are running Win7 Home Premium, 1 is running XP sp3. 3 of the computers have no trouble accessing the other machines. (one of these is the XP machine). But my desktop machine (Win7) is only able to see my laptop. The other 2 don't appear in the network map. I can ping the absent computers. I am not using HomeGroup. Workstation running DHCP Client running DNS Client running Server running TCP/IP Netbios helper running Computer Browser running Network Discovery is ON File and Printer sharing is ON Windows Firewall OFF All computers running BWMeter with firewall. (Turning BWMeter off changes nothing) I ran the Network Diagnostics tool, and after running for 1.5 hours, it was still "Waiting for results", so I canceled it. Router is a Buffalo WRT-HP-54G with DD-WRT firmware. I don't know what else to try. I can't understand why my desktop can detect one, but not the other two computers on the network. Any help will be much appreciated.... I have very little hair left to pull out at this point.