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I created a "System Backup" image of the orginal Windows 8 x64 and saved on the 2nd partition.
Verified the image and even restored just to make sure it worked.
Now I've upgraded to Windows 8.1 and again created and verified an image on the 2nd partition.
I cannot go back and restore to the orginal Windows 8. Even though when going through the process it starts as "System Restore". The 1st image created no longer gives me the correct "Source -> Destination" Operation Summary, it now shows as a "Partition Restore" instead.