Visibility to other PC/Computers via File Explorer -> Network or pinging is not an issue. The subject laptop is also "visible" (by its system name) from media players like Smart TV and Blu-ray devices.
The problem, consistent whether attempted from another PC/Computer or media player device is that I AM REFUSED ACCESS TO MEDIA LIBRARIES. On ALL DEVICES (PC/Computers and / or Smart TVs and Blu-ray players) when I try to access / play listed media from
a supposedly shared library I RECEIVE AN ALERT THAT THE DEVICE FROM WHICH I AN ATTEMPTING TO CONNECT DOES NOT HAVE SUFFICIENT PERMISSIONS TO CONNECT / PLAY MEDIA FROM A SHARED MEDIA LIBRARY.
Simple PC to Media Device success example:
- on Samsung "smart" Blu-ray player, I select "Music" from "My Content" menu.
- The player displays a choice: "Workstation:MyUID" and "Laptop:MyWifeUID" (these are not the actual names and UIDs for security reasons).
- Selecting "Workstation:MyUID" shows a list of "folders" corresponding to my shared media libraries, "Music, Pictures, Videos" and "Playlists".
- Drilling down into "Music->Album" I can select and play tracks.
Simple PC to Media Device Failure example:
- on Samsung "smart" Blu-ray player, I select "Music" from "My Content" menu.
- The player displays a choice: "Workstation:MyUID" and "Laptop:MyWifeUID" (these are not the actual names and UIDs for security reasons).
- Selecting "Laptop:MyWifeUID" shows "FAIL TO ACCESS DEVICE. Please check device and try again."
Simple PC to PC Success Example:
- On the laptop, select "File Explorer->Network>Media Devices->Workstation:MyUID".
- Windows Media Player appears loads the "Music" library from "Laptop:MyWifeUID" into the main window and lists "Workstation:MyUID" under "Other Libraries in the side panel.
- Selecting "Workstation:MyUID" from the side-panel shows the Music Library from "Worstation:MyUID" and allows me to play media from the selected library.
Simple PC to PC Fail Example:
- On the workstation, select "File Explorer->Network>Media Devices->Laptop:MyWifeUID".
- Windows Media Player appears but loads the "Music" library from "Workstation:MyUID" (since it is visible AND accessible from the laptop). The Music library on "Lapto:MyWifeUID" is not displayed, and does not appear under "Windows Media Player->Library"
"Other Libraries" nor will it appear by right-click "Refresh Other Libraries" on the "Other Libraries" entry in Windows Media Player.
SMB 1.0/CIFS Client - Server "Dance":
Performing these steps on the laptop simply caused it to disappear from the File Explorer->Network->Media Devices list and become invisibile from media player devices like Smart TVs and Blu-ray players to which it was at least visible
before. This visibility condition only corrected itself AFTER the last pushed Windows 10 update to the laptop. It is once again visible but still NOT ACCESSIBLE as a "Media Device" on the network.
RESETTING SHARE PERMISSIONS FOR A SPECIFIC USER:
The steps you outline from "Map Network Drive" are not useful BECAUSE I HAVE NO IDEA WHAT "USER" CORRESPONDS TO EXTERNAL MEDIA PLAYERS SUCH AS SMART TV'S AND BLU-RAY PLAYERS. And I certainly am not going to set it to "Everyone" for obvious security
reasons.
DISM / SFC:
Having run them multiple timed on the laptop has not corrected the situation. Both suggest there are no errors to be found.
NETWORK SHARING, STREAMING, LIBRARY & FOLDER SETTINGS AND PROPERTIES.
All the permissions, security settings, streaming settings, Windows Features for shared media libraries and Windows Media Player on the laptop are identical to those on the workstation EXCEPT that the workstation includes an "ASP.Net Machine Account (WORKSTATION\ASPNET)"
principal. On the workstation's folders that make up the shared librariesin their "Properties->Security" tabe ASP.Net has "Read & Execute", "List folder contents", and "Read" permissions checked. On the "Properties->Sharing" tab "Share" button, "ASP.NET
Machine Account" has "Read" permission level listed as well as "MyUID" with "Owner" permission level.
The laptop only has "MyWifeUID" with permission level "Owner" in the Properties->Sharing" tab "Share" button pane. The security tab lists identical principals with identical permissions to the workstation WITH THE EXCEPTION OF "ASP.Net Machine Account".
I cannot create an "ASP.Net Machine Account" user or security principal on the laptop, and I have no idea what or when it was created on the laptop.
ALSO, the laptop does not respond to selecting the "Settings-> Network & Internet->Sharing Options->All Networks->Public folder sharing" radio button to "Turn on sharing so anyone with network access can read and write files in public folders." In fact
any changes made in the "Network & Sharing" and "Media streaming options" seem to have no effect on the items they are supposed to change. It is as if the OS on the laptop completely ignores these settings. (Perhaps associated registry keys had their permissions
locked so they cannot be changed from Control Panel / Settings?)
CONCLUSION:
Windows Update scrambled some registry entries with regard to media streaming / media library sharing / network sharing when it removed HomeGroup as a sharing mechanism from the OS, but did not make the same mistakes when it updated the workstation.
I need to know ALL the registry settings that effect Windows Media Player / Windows media 'Library' sharing and streaming over my local, private network. I am convinced that is where the problem lays that allows one machine's media to be shared and makes
another's unshareable despite identical settings in Settings, Control Panel and folder Properties Security and Sharing tabs.