Win 7 64-bit, Macrium Reflect Home Edition, Version 6.3 1821 (64-bit).
This morning I tried mounting an image from a network drive and assign a drive letter, without much luck.
It took me a while until I figured out I had to pause protection in 'Folder Guard' (not just allow full access to the drive as I would usually do).
I am using Folder Guard to have my B: (backup) drive letter protected.
I have defined a password for read access and another password for full access.
I have also added the various Macrium Reflect EXEs as trusted (so backups run as per schedule with or without the user logged in etc - and without the need to unlock the folder manually).
Macrium Reflect does have full access to the B: drive but I still couldn't mount the image.
I also tried to unlock the folder for full access, but Macrium Reflect still couldn't mount the image.
Only when I paused the full Folder Guard, I could mount the image.
EventLog showed the following:

When I had full access to the image, and moved some large files to my local drive, only "System" was showing up as taking some 5% resources via Windows Task Manager.
Am I right to assume that PSMounterEx is part of Macrium Reflect? What permissions would I need or what program would I need to add as Trusted to make this work without unlocking?
I already have the following listed under 'Trusted programs' in Folder Guard:

I also assume Windows permissions are not involved in this problem, as I can mount the image to a drive litter by simply pausing protection within Folder Guard.
I assume it's simply another process that tries to access/mount the image, or Macrium Reflect uses another Windows user.