Corrupt images, any ideas

A while back my hard drive crashed (software issues) and a few thousand photos were temporary lost. I recently purchased some recovery software and was able to recover most if not all photos, however some photos (~15%) seem to be corrupt. For example, when I open a corrupt image in Microsoft Photo Editor the image comes up but some of it is incomplete. When I zoom in to where the photo ends and the corruption occurs, I noticed a repeating pattern of 8x8 pixels that repeats throughout the rest of the image. The image will not open in Windows Picture and Fax Viewer, says’s “Drawing failed” and any other program that does open it shows the same pattern or just a blank area (gray). I’m confused because when I’m in the folder with the photos and I’m in the “Thumbnails” view, all the thumbnails come up as if everything is normal, the image appears compete and full. Does this mean that the information is there but a minor corruption in the image is causing the program to not display the rest of the photo? The photos properties seem to be fine and file size looks to be normal (as if all information was there). I’m just wondering if anyone has any ideas of how to fix or access the entire photo if possible? I will gladly send anyone a copy of a corrupt photo.

Here’s what I see in my folder thumbnail:

Zoom of corruption in Microsft Photo Editor:

Thanks

Explorer creates a separate file containing the thumbnails on each directory; presumably that was fully recovered (or at least enough to show the whole thumbnail for most of your photos).

Here is a post that may be helpful.
https://photography-on-the.net …php?p=1094267&p​ostcount=8

From this thread.
https://photography-on-the.net/forum/showthre​ad.php?t=129643

Jon wrote in post #2307837
Explorer creates a separate file containing the thumbnails on each directory; presumably that was fully recovered (or at least enough to show the whole thumbnail for most of your photos).

Since the files were recovered from one drive and placed in a new folder/directory on another drive, would explorer create a new thumbnail with information from the new image file? If so and the thumbnail is complete, is it possible that the actual image is complete except for a corruption somewhere in the image that the thumbnail skipped as it only needs a fraction of the data to create the thumbnail? I understand what you mentioned but if the files are separate, I should have two copies of each, one image and one thumbnail. Since my recovery only searched for “Digital Camera” files I don’t have any thumbnails that were created to compare. I could see how one could be corrupt and the other not if they were together within the file but if explorer made new thumbnails with the newly transferred images then the data should be there, the thumbnail got it from somewhere? I apologize if none of this makes sense and I appreciate your feedback.