Most Valuable Professional
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The Image ID is randomly generated every time a new Full is created; the initial character doesn't matter. Initially I thought you meant that all of your previous images had the exact same Image ID whereas only the new one was different, but rereading your post I see that's not the case because you were looking at multiple Fulls and a new Image ID is generated with every Full, so I've edited my own post here.
In terms of why the restore from your most recent image is failing, make sure you're restoring the entire disk from the source image onto the destination, not just the C drive. If you already did that, have you tried going back into Rescue after the restore and running the Fix Boot Problems function? In the worst case, if you can only get that older image to restore, you would still be able to "browse" the most recent image within Windows. That will cause it to mount as a virtual disk, at which point you can copy/paste any data you need from that image onto your system that was restored from the older image. Application installations can't be recovered like this of course, but at least you'd have your most recent data.