Example, portable CCleaner (just for testing isolated launch - and not actual use)
However, I always get the attached ReHIPS error message.
That's strange. Could you us give more information: Isolated environment Media access rights options, type of external media used and type of filesystem on that media (FAT, NTFS, etc)?
If I enable "Copy User Data" later, I assume no data is ever copied since it never fixes the issues.
The most possible reason for this was explained here
it runs without settings at first (as there are no settings in the empty isolated environment and Copy data flag is not set), creates default settings (without any extension) and uses them later (even if Copy data flag is set, it isn't needed anymore as settings are present in the isolated environment and won't be copied on demand anymore).
In other words, Cyberfox doesn't see any settings at first and creates default settings. Copy User Data copies only files that are absent is the isolated environment, but present in the real user environment. And as there are settings present in the isolated environment (default newly created) nothing is copied later when Copy User Data flag is set.
The first screenshot Capture46.PNG, it doesn't look like active isolated environment. It looks like this was isolated environment, but it's deleted, hence most of the files were deleted, but some are in use by Windows and will be deleted after reboot.
Does "Copy User Data" completely load Documents, Downloads, Music, etc including all folder contents ?
Like I said
With this flag set registry keys and file/folders are copied from the real user to the isolated environment on demand (the application tries to reach them, they're not in the isolated environment, but found in the real user environment).
In other words, a program tries to access some file. It's absent in the isolated environment, but is present in the real user environment. Then it's copied. Usually programs try to access only their settings from Local or Remote AppData. Other files and folders you can see in ReHIPS user profile are just system objects, Windows created them for internal needs.
There is no use to set any access to the real user profile folder files or folders in the isolated environment options. Any access to the real user profile folder is redirected to the ReHIPS user folder. So if the file being accessed exists in the ReHIPS user folder, it'll be opened. If the file being accessed is absent in the ReHIPS user folder, but Copy User Data flag is set, it'll be copied to the ReHIPS user folder and then opened. In other cases access will result in error. So no direct access to the real user profile folder by the isolated program is performed, thus there is no use to set any access to the real user profile folder files or folders.