I recently bought a refurbed Dell Optiplex 3020 and a refurbed Dell Latitude E6540, both of which came with Windows 10 Pro, Version 21H1. While I am coming to terms with Windows 10, so far I am having limited and somewhat confusing success in getting the two to communicate. I quickly learned to ignore any Internet help that spoke of Homegroup and any that did not specifically address the Pro version.
For reference, this is the configuration I'm dealing with:
Media64LT (in WORKGROUP), Dell Inc. Latitude E6540 00, Windows 10 Professional (x64) Version 21H1 (build 19043.1466), Intel(R) Centrino(R) Ultimate-N 6300 AGN (5.0Ghz wifi)
Media64 (in WORKGROUP), Dell Inc. OptiPlex 3020 00, Windows 10 Professional (x64) Version 21H1 (build 19043.1466), Realtek PCIe GbE Family Controller (Ethernet)
TP-LINK N750 Model TL-WDR4300, Firmware: 3.14.3 Build 151104 Rel.45874n
ZoneAlarm Free Firewall version: 15.8.181.18901, Vsmon version: 15.8.116.18864, Driver version: 15.1.29.17237
When I invoke the Network view from Media64LT, I can "see" Media64LT and the router. I can open Media64LT and access the shared folders. No sign of Media64.
From Media64, I see Media64, Media64LT and the router. I can open Media64 and access folders. But attempts to open Media64LT returns the error message "Windows cannot access \MEDIA64LT." It appears to be a Permission issue.
I followed a series of steps from https://thegeekpage.com turning on SMB1.0 feature, changing Startup type FDRP, turning on network discovery, file and printer sharing, turning off password protected sharing, etc. All to no avail.
I have found nothing in the router configuration nor the firewall settings that jump out as being a problem, but I confess I'm stumped.
What am I overlooking?