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#21
Hi Greg
Have you tried Network Reset on all PCs yet?
Best way:
Turn off all PCs, Turn off the router. Wait 30 sec.
Turn on router, wait for it to completely start up.
Start with sys1 > startup > do the reset > restart sys1
Continue to sys2 > startup > do the reset > restart sys2
Do the same with sys 3&4
See if all PCs see each other in Windows Explorer