So maybe it's your credentials or the way you are sharing. I use user and password to share (just as well as homegroup is disappearing, V1803).
I have to log into machine and then from there credentials are stored.
Long thread so I don't remember, is homegroup disabled on all devices.
Then maybe start credential manager and remove your credentials (both machines) and then log in. See if behaviour changes.
I found out why.
I always run Win10 File Explorer as administrator from a shortcut. If I don't run it as administrator, then "Movies & TV", "Groove Music" and Photos can successfully open Win7 shared files.
But I would like to run File Explorer as administrator. So, can this problem be solved?
I assume other system is not recognizing your id with elevated privileges.
Can I ask why you need file explorer as admin?
That's probably true because after I have logged into the Win7 machine from the non-elevated Win10 File Explorer, when I launch another instance of Win10 File Explorer as administrator to access Win7, I have to log on once again... and vice versa.
I run Win10 File Explorer as admin so that excutables run henceforth from within File Explorer can automatically acquire elevated status.
When I say: "run Win10 Explorer as admin", I mean that I open a shortcut of "%windir%\explorer.exe" with the checkbox of "Run as administrator" being ticked in the Advanced Properties dialogue.
You should never need to gain access to the %WinDir% as this should not contain any user files, and the whole OS protection scheme is designed around the prevention of access to this area by Malware (and accidental deletion of critical files by legitimate users).
There are preset folder structures for storage of user files Music. Pictures, Etc, but you can make your own if you wish, but the potential to destroy the OS will always exist if you accidentally damage or delete a system file in the windows folder
These UWP apps (i.e. the new Windows 10 style) can't run as administrator. You could try making administrator accounts auto-elevate without prompting but it would be quite a big security risk.
How to enable an Administrator to open Metro apps in Windows 10 - TechRepublic
It would be safer (even if that works) to run File Explorer unelevated and give your user correct authorities to whatever it needs on Windows 7.
I tried modifying those group policy settings as suggested in the article that lx07 points me to. But remote Win7 files, when clicked on in an elevated instance of Win10 File Explorer, still can not be opened by "Movies & TV", etc.
However, it's good for me, a new comer to Win10, to learn that Win10 now treat the "modern" apps in a special way different from it does the traditional programs and realize that this "problem" I expreience must have something to do with Win10's management of security. So, I think I'd better follow Win10's lead and let it be. Anyway, it's not a major problem.
Thank you, guy, for reaching out.
Best practice is to not run as a user that is member of administrators group as it is fairly trivial to write a program to grab any authority if you do. Look at NSudo for example. Having said that at home I run as an administrator as I'm too lazy and hope for the best...
You should be able to open a file from a shared drive from Windows 10 - I just tried with Photos and worked (although it was an External USB, not Windows 7 install). What I think you need is NTFS read and execute authority so perhaps you could try that.
Make your share "Everyone" full control (it is easier and just as secure like that) and then also give your user (on 10) full authority to file. Then if it works you can keep reducing NTFS authority on the file until it doesn't work anymore.
Tried raising the privilege level of Everyone to Full Control on a Win7 shared mp4 file, but the 'problem' didn't go away.
Anyway, as I've read the guidances provided in this thread, this 'problem' probably should not be a 'problem', but a designed mechanism existing for security concerns. Therefore I think it should be wise to leave it that way.
Many thanks again to all the people who have helped me here. I do appreciate it.
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