Hello again folks. Thought this was solved and the reason I could not RDC from Win 10 to 8.1 was because I did not have Pro. Well, now I do have pro and the problem is the same. What I have...

Yes and the Win 10 Tech preview that I am using is also pro so that indeed explains it. Thanks for pointing me on the right direction.

Also, I believe I was mistaken that my Win 7 computer was successfully RDCing to windows 8.1 as well (if it was it isn't now - but I'm now thinking it never did due to the way I was testing the RDCs)...

No, not pro

Yes I am running Windows 8.1

Yes. All computers talk to each other and can share public folders except Win 10 cannot Remote in to Win 8.1 even with both firewalls down.

I have the reverse problem (recent post) in that I can connect Win 10 to Win 7 but not Win 8.1, but both can connect to Win 10 (Remote DeskTop) Win 8.1 came preinstalled and Win 10 was a clean...

This is like an algebra question and I was never good at algebra.

My Network in a nut shell

Computer A - Windows 7 Professional Desktop
Computer B - Windows 8.1 Laptop
Computer C - Windows 10...