Synopsis: a system backup cannot be accessed from explorer
Setup:
0) Windows 10 installed on a BootCamp partition successfully created by OS X (High Sierra)
1) created a system backup using Backupper Professional
2) verified backup successful
3) Backupper Pro:Utilities:Explore Image
a) select the system backup to explore
b) select the backup point (in this case there was only one)
c) map disk/partition to new drive letter (D:, F:, whatever; in this case, 
)
d) Image preview is initialized, checked and attached to drive successfully
4) open explorer and select drive
a) a modal dialog displays the following information:
(1) location is not available (in the title bar)
(2) \ is not accessible
(3) Incorrect function
5) Return to Backupper Pro: Utilities:Explore Image and detach image successfully
What to do? Windows 10 appears to be well behaved. I have no issues booting back and forth from OS X to Windows. OS X Disk Utility pronounces all the partitions as healthy. And, for that matter, so does Backupper. I am at a complete loss as to how to access this backup. By the way, I created a new backup of a new Bootcamp partition and encountering the same problem. I really need to get this data back so any help would be appreciated.