With these methods, you can fix thumbnail problems on Windows 10 computers. you can also recreate the thumbnail database, which would fix most of the thumbnail problems.
Recreate the Thumbnail Cache
You can use Disk Cleanup utility to recreate the thumbnail cache on Windows 10 computer.
Step 1. First of all, open File Explorer.
Step 2. Right-click on the C:Drive and select ‘Properties’
Step 3. Now under the General tab, click on ‘Disk Cleanup’
Step 4. Now check the ‘Thumbnail’ option and uncheck all other options.
Step 5. Finally, click on ‘Ok’ and click on ‘Delete files’ to confirm the action.
Recreate Thumbnail Cache using Command Prompt
Step 1. First of all, right-click on the Start button and select ‘Command Prompt (Admin)’
Step 2. On the command prompt window, enter the following command –
taskkill /f /im explorer.exe
Step 3. The above command will close the File Explorer.
Step 4. Next, enter the following command on the command prompt to delete the thumbnail database.
del /f /s /q /a %LocalAppData%MicrosoftWindowsExplorerthumbcache_*.db
Step 5. Once done, enter the following command to start the File Explorer
Step 6. Wait until the process completes.