New
#1
Run this Thumbnail cache clear and reset
https://www.tenforums.com/tutorials/5...dows-10-a.html
OK, if you can run these programs, then you probably started them from start menu or desktop. What do the icons look like there. Right click and go to program location, and try switching icon image to another, and then back. This can be very problematic, and is a real pain in the a$$ to fix sometimes. I do not know what kind of document icon you have, is it MS Word? But you can do a repair, or uninstall, and reinstall to fix.