The problem is: once you have started Plex server “As Administrator”, the access permissions of some files within its Plex data folder are set to the Administrator user.
Which makes it impossible to either change, delete or even simply read them by other Windows user accounts.
Never run Plex Server as Administrator. There is no need to do so.
To repair the damage, you need to:
- shut down plex server
- reset the “ownership” and file access permissions of every file, folder, subfolder back to defaults.
In the end, the Windows user account under which Plex server is regularly started must have full read/write access.
You can use Windows own “properties” dialog or the command prompt to solve this.
Here is a simple tool to do this a little bit more comfortably http://lallouslab.net/2013/08/26/resetting-ntfs-files-permission-in-windows-graphical-utility/
