No, the homegroup doesn't exist anymore, but the older way of assigning a drive letter to a shared folder on another PC still works. I can access my XP PC from my Windows 10 PC (they both have a Windows account with an identical username) and the other way around, in just the same way as when both were XP.
I never even switched to homegroups in between. Too new. Not needed.
I have a laptop still running Windows 7 and a desktop which I just upgraded to Windows 10. When both were on W7, I used a homegroup to trade or stream files from one to the other, such as playing a video file from the laptop on my desktop, which uses a 42" TV as a monitor. But it seems W10 no longer supports homegroups as of version 1803.
When I go to File Explorer > Network on the desktop, it shows my laptop computer, but gives a network error which says I "do not have permission to access \\[Computer name]" and to contact my "network administrator to request access." (But...I AM the network administrator.)
On the laptop, File Explorer > Network doesn't even show my desktop computer, so when I manually enter the name into the address bar, it demands a user name and password. I tried entering these for the desktop, like it wanted me to login remotely, but no go. I tried entering these for the laptop instead, but no. I tried entering these for the network itself, again no.
I looked up windows credentials and found the credentials manager, which is something I've never encountered before. Googling has failed me, because I can't seem to get a straight answer out of what this is for and how it works. I don't even know if this will let me do what I used to with a homegroup.
Are W7 and W10 even compatible in this way? It's only a minor inconvenience and I will probably update my laptop to W10 anyway, once I get the the hang of things, but I'd rather understand what the issue is than merely overlook it.