I have an Windows 7 7057 Notebook connected to 4 XP PC through a switch and a router (for internet). They see my computer in Workgroup. I can ping al of them in cmd., I can use the network printers. I can acces the internet. I don't see the other computers in Network, only mine.I have verified the services (Workstation, DHCP Client, DNS Client, Server, TCP/IP Netbios helper, Computer Browser), file and printer sharing etc. In build 7000 I had the same issue but starting some services I solved. Upgrading with Build 7022 and then Build 7048 all was OK. But after upgrade at 7052 I have this issue.

Here you go. Follow the link.Windows 7 Unauthorized Versions

Has anyone figured this out? I can't see xp computers, but xp can see win 7.David Schachman