
Try one of these uninstaller applications! Now, just open any folder. When you hover over a preview thumbnail, it dims other open windows and shows a preview of its app. Changing these settings might have some unexpected consequences on your system, so keep that in mind. Classic/legacy Edge also don't have taskbar thumbnail preview. Sometimes your thumbnails might not be showing due to third-party applications. Sometimes these types of problems can occur if your system files are corrupted. The Windows 7 Thumbnail Taskbar Preview should now be so delayed that it is effectively no longer working. This is an unusual solution, but few users reported that it works, so feel free to try it out. Repeat these steps for all extensions that have problems with missing thumbnails. Now, wait for a minute or two, disable it again and save changes. This problem can occur in File Explorer due to your settings. Few users claim that this problem started appearing after disabling IconCodecService.dll service. Method 2 – Turn Off Aero in Windows 7/8/10. This can be an annoying problem, and today we’re going to show you how to fix it on Windows 10.

Select the problematic file type and double click it. This is rather simple and you can do it by following these steps: After resetting File Explorer Options to default settings, the problem should be resolved completely. If the same program has 2 or more windows open the preview doesn't work and shows up as on the first screenshot.
