The Windows Registry Editor page will get opened.

Press the Windows button and R alphabet on the keyboard together.

It will delete the current (may be corrupted) Thumbnails cache from your system drive and Windows will create the new cache again on need.

Now, on the Disk Cleanup for System dialogue box, select Thumbnails and Temporary files checkboxes under Files to delete section.

The drive scanning process will get started.

Next, you need to select the system drive on which you want to perform the scan and cleanup.

Go to the Search menu and type Disk cleanup.

Now, check if thumbnails previews appear again.

On the Visual Effects tab, under the Custom section, select two checkboxes – Save taskbar thumbnail previews and Show thumbnails instead of icons.

The Performance Options dialogue box will get opened.

On the Advanced tab, click the Settings option under the Performance section.

Next, a dialogue box System Properties will get opened.

On your Windows 10 system, search View advanced system settings and select the same search result to open it.

If the option was selected, then deselecting it might solve your problem.

Here, switch to the View tab, and under the Advanced Settings section, ensure that Always show icons, never thumbnails option is not selected.

A dialog box namely File Explorer Options will get opened.

Type File Explorer Options in the search box of your Windows 10 system and select the option File Explorer Options.

If you have complaints related to Thumbnail previews on your Windows 10, then simply try these fixes.

Read Also: Recover Deleted Windows Files Ways to resolve Thumbnail preview issues

Onedrive not showing in file explorer windows 10