I almost never use Windows Explorer because MS just hasn't gotten a clue about how to handle a File Manager yet. I checked awhile ago, and MS still doesn't have a Copy or Move command. Or at least they don't work as they should. I use Powerdesk Utilities for my file manager and zip utility. I use ThumbsPlus to manage and view my thumbnails. I have an extensive collection of graphics files, with screenshots, and artwork. I don't see thumbs.db in any of the folders. And yes, I do have Windows setup to show hidden files and folders, in addition to showing file extensions of known file types. Heck, I wrote a "mini tutorial" in the Poser forum about that very subject.