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However, there is strong indication that the culprit has to do with with the "verschlimmbessert*" bloatware from Adobe, Adobe Acrobat DC. is irrelevant to the issue as the problem appears in all sizes. I hope this helps.Thank you Lottiemansion What are your view settings in explorer set to? ( Taskbar Toolgroups used to retain menu order) My finding answer #10. And despite running registry difference apps I was unable to find which entry changed respectively restored it. (I spare you the description of the suggestions I got to "fix" it, never mind getting someone to understand in the first place what I was talking about)īy accident, "slip of the hand with the mouse" I discovered how to restore it. Last year I had an issue that suddenly my tool bar group menu structure I had sorted to my needs suddenly auto-sorted. PS: Just to mention about another Windows 10 saga: If you change on a PDF file in any given subfolder just one character in the file name, or add or remove a space and re-save/overwrite the file with the "new' name, the PDF thumbnail image previously missing in the subfolder appears now! (image3: "Problem solved.jpg")Īfter a while the same problem is present again. In a somewhat relevant but different behavioral way it is the same issue with the preview of thumbnail images within sub-folders icons. Upon opening older PDF files and implementing a minute change on the document and then undoing that change, if needed, so that I could re-save the document, the icon image disappeared and the thumbnail image of the document was here again. In the beginning the issue was that all older PDF files, created or opened with the prior version, just showed a large PDF icon symbol whereas the ones with the newer version produced the thumbnail image. But to find that is a futile attempt at best. Since I recently upgraded Adobe Acrobat I suspect strongly that their poorly executed non intuitive bloatware app is the culprit by having changed something in the registry. So instead of all the mindless generic help everywhere in the style of "if all fails to 'un-jam' the front door in the house just tear down the house and rebuild it." Here is (a) WHAT I FIRST THOUGH I FOUND as a solution: The bug like so many in these flawed Microsoft products if not all, lies buried in the registry somewhere deep and despite having spent hours I have not been able to find exactly which particular entry causes it. Certainly not Microsoft themselves and their utterly inept "support answers" are a bad joke at best. These are one of many very odd bugs in Windows 10 that are buried somewhere so deep in the registry that nobody can ever find them.
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(image2 "The sub-folders with PDF icons.jpg") Only PDF icons, while when opening the folder I can see all the thumbnails (Imge1 "The PDF files.jpg").
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Thumbnail images of PDF files within sub-folders of a folder one day stopped to show.
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