Fix Thumbnail Previews Not Showing in Windows Explorer 7,8.1
At any time you open Windows Explorer and view images, you see the mini of the photos in its icons place. These are called Thumbnails. By default, Windows OS displays the thumbnails of different files (such as images, video, Word documents, so on.) inside of the Windows Explorer. But when you see just its default icon, then this content will help you fix the problem.
How to fix thumbnail previews not showing in Windows
In the Windows 7:
First, you need to open Windows Explorer. Click Organize button >> Click Folder and search options
At interface Folder Options, choose Tab View. Then, uncheck a box Always show icons, never thumbnails- OFF. >> Click Apply. Done
In the Windows 8.1
First, you need to open Windows Explorer >> Click Tab View >> Choose Options >> Choose Folder and search options
Then, You can uncheck a box Always show icons, never thumbnails- OFF
If you can't open Foldler and Search Options by destructive virrus in your PC, this way can help you fix the issue.
First, you open System Properties
Open Run dialog box (Windows + R). Then type SystemPropertiesAdvanced.exe and press Enter in Keyboard
or Click right in Computer on Desktop >> Chọn Properties.
At interface System Proterties window, you choose Setting in Perfomance.
Then check a box in Show thumbnails instead of icons. Done