Fix Preview Pane Not Working in Windows 10

The preview pane in Windows 10 File Explorer stops showing file contents for many users, often due to disabled settings, incompatible preview handlers, or a corrupted Explorer cache. This guide walks through the most effective fixes, from enabling the pane to resetting the system, so you can restore quick previews of images, documents, and videos.

What Is the Preview Pane and How It Works

The preview pane is a File Explorer feature that displays a thumbnail or a read-only preview of a selected file without opening it. It works through a set of system components called preview handlers—small programs registered by each application (e.g., Microsoft Word, Adobe Acrobat, or the Windows Photo Viewer) that tell Explorer how to render the file’s content. When you click a file, Explorer asks the appropriate handler to generate a preview; if the handler is missing, outdated, or blocked, the pane shows nothing or an error.

Windows 10 includes built-in handlers for common types like images, text files, and videos, but third-party apps often replace or add their own. The pane is independent of the details pane (which shows metadata like size and date), so you can enable or disable each separately.

Why the Preview Pane Stops Working

Several common causes lead to a non-functional preview pane:

Pane is simply turned off – The toggle in the ribbon may have been accidentally disabled.
Explorer is set to “Always show icons, never thumbnails” – This performance option disables all previews, including the preview pane.
Corrupted thumbnail cache – A damaged cache can prevent previews from generating.
Conflicting or broken preview handlers – Third-party software (e.g., older PDF readers or codec packs) can register faulty handlers that crash the pane.
File type not supported – Some formats (like certain raw camera files or exotic extensions) have no handler installed.
System file corruption – Damaged Windows system files can break Explorer’s preview functionality.

Quick Fixes to Try First

Start with these simple checks—they resolve a large share of cases:

Enable the preview pane: Open File Explorer, go to the View tab, and click Preview pane (it should be highlighted). If it’s already on, toggle it off and on again.
Check the “Always show icons” setting: In File Explorer, go to View → Options → Change folder and search options. Under the View tab, uncheck Always show icons, never thumbnails and click OK.
Restart File Explorer: Open Task Manager (Ctrl+Shift+Esc), find Windows Explorer, right-click it, and choose Restart. This reloads the shell and often clears temporary glitches.
Try a different file type: Select a common image (like .jpg) and a text file (.txt) to see if the issue is specific to one format.

Reset the Thumbnail Cache

A corrupted cache is a frequent culprit. Windows stores thumbnails and previews in a hidden database that can become stale or damaged. To rebuild it:

Open File Explorer and go to View → Options → Change folder and search options.
On the General tab, under Privacy, check Show recently used files in Quick access (this ensures the cache is active).
Close all Explorer windows.
Open Disk Cleanup (search for it in the Start menu), select your system drive, and click Clean up system files.
Check Thumbnails in the list, then click OK and confirm deletion.

After this, the cache will be rebuilt automatically as you browse. If Disk Cleanup doesn’t work, you can manually delete the cache files in %LocalAppData%\Microsoft\Windows\Explorer (look for files like thumbcache_*.db), but make sure Explorer is closed first.

Repair or Reset Preview Handlers

If the pane still shows nothing, the problem likely lies with a specific preview handler. Here’s how to diagnose and fix it:

Identify the file type: Right-click the problematic file, choose Open with, and note the default app. For PDFs, it might be Adobe Acrobat; for Office docs, it’s Word or Excel.
Reinstall the associated app: Uninstall and reinstall the program that handles that file type. This re-registers its preview handler.
Use built-in handlers: For PDFs, you can switch the default to Microsoft Edge (which has a built-in preview handler) by right-clicking a PDF → Open with → Choose another app → select Edge and check Always use this app.
Check for third-party codec packs: Some video/audio codec packs install handlers that conflict. Temporarily uninstall any such pack and test again.

If you’re comfortable with the Registry, you can also check HKEY_CLASSES_ROOT\\shellex\{8895b1c6-b41f-4c1c-a562-0d564250836f} to see if a handler is registered. But editing the registry incorrectly can harm your system, so it’s safer to reinstall apps first.

Run System File Checker and DISM

Corrupted system files can also break the preview pane. Windows includes two tools to repair them:

Open Command Prompt as administrator (search “cmd”, right-click, Run as administrator).
Run sfc /scannow and wait for it to finish. It will replace damaged system files if any are found.
If SFC reports issues it can’t fix, run DISM /Online /Cleanup-Image /RestoreHealth (this may take several minutes).
Restart your PC and test the preview pane again.

These tools are safe and don’t affect personal files, but they require an internet connection for DISM to download repair files.

Advanced: Use PowerShell to Re-register Explorer

If nothing else works, you can re-register the Windows Store apps and reset Explorer’s internal state. Open PowerShell as administrator and run:

Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

This command re-registers all built-in UWP apps, which sometimes restores missing preview handlers for images and videos. It’s safe but may take a few minutes. After it completes, restart your PC.

Frequently Asked Questions

Why does the preview pane work for images but not for PDFs?

This usually means the PDF preview handler is missing or broken. If you’re using Adobe Acrobat, reinstall it. Alternatively, set Microsoft Edge as the default PDF viewer—Edge includes a built-in preview handler that works reliably.

Can I preview files without the preview pane?

Yes, you can use the Details pane (View → Details pane) to see metadata, or hover over a file to see a tooltip thumbnail. For documents, you can also use the reading pane in Microsoft Office apps.

Why does the preview pane show “No preview available”?

This message appears when no preview handler is registered for that file type, or the handler is disabled. It’s common for obscure formats. Check if the file opens correctly in its associated app; if it does, the handler is missing.

Does the preview pane slow down my PC?

It can, especially when browsing folders with large video files or complex documents, because Explorer loads the handler and generates a preview each time you select a file. If performance is an issue, you can disable the pane and rely on thumbnails only.

Will resetting Windows fix the preview pane?

Resetting Windows (via Settings → Update & Security → Recovery) will restore all system files and settings, which will almost certainly fix the preview pane if it’s caused by corruption. However, it also removes installed apps and personal settings, so try the other fixes first.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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