P-2-P and Homegroups

[thecanarian 16]

HI,

I have 2 PCs connected via my BT 5 hub. For many years under Win 7 the P2P and the Homegroup I set up worked fine. I first upgraded my secondary (B) machine (32 bit) to Win 10 a couple of months ago, and was surprised that it seemed to resolve the P2P and Homegroup configuration. But I have recently upgraded my Primary PC (A) 64 bit) to Win 10.

And now :

• Neither of the 2 PCs have an option to view the Homegroup password or leave it.
• My main machine, A, can still see all the folders on B, BUT B appears not to see A ie when in Explorer and clicking on Network in B it doesn't see A, but when in A it does see B.
• The network name on A is "Network 2" and on B it's "Network 3".
• The network sharing centre on either machine no longer shows a full schematic ie including Hub.
• The Windows firewall is turned off on both machines.
• My local firewall is Bullguard (on both) and none of the settings have been changed (yet).
• Perversely the application I run on B, ASN weather generator, still seems able to pass data to FSX:Steam on A.
• None of the Widows troubleshooters find anything wrong.

Does anyone have any ideas how I can regularise this situation so B can look at A ?