done that. been working on this for months. no firewall. Ping replies are not disabled.
thinking that may be more of a stack overflow. Been a part of more than one workgroup over the years.
As an aside, I downloaded and installed netbeui on the problem machine and two others. It's been a long time for netbeui and me, and I'd forgotten about it, but the two other machines could instantly see and access the problem pc.
so I think it's a tcpip issue. and I'd really appreciate help solving it.
In direct response to you Cyberat_88, is there a way, to quickly unsecure a pc, like... to revert to defaults?
Yes, but the netbeui software would still be running, check those settings first. Go to Control Panel - Internet Options and Reset to Default. More drastically, uninstall network card and reboot.
However, anti-virus settings will remain, since you replaced NICs the reset has happened. How many IPs do you allow from DHCP ? Tried changing PC name ? Workgroup names should be identical on all PCs.
yep renamed the workgroup AND the pc. But the point is, ping replies are at a much lower layer (probably logical layer) than workgroups (using the OSI layer diagram). I don't need workgroups or common names at all to simply get a ping reply. But the ping command is a tcpip function. And I think it's microsoft's xp implementation of tcpip that's the problem. A stack somewhere.