Fix Windows 10 doesn’t show taskbar thumbnails on mouse hover

If your Windows 10 doesn’t show taskbar thumbnails on mouse hover, we have a couple of working solutions for you. Let’s check them out.

If you hover the mouse cursor over the icon of a running program on the taskbar, a small pop-up window appears above the cursor. It is a thumbnail preview of the window of the running app. This is a useful feature because it gives you a visual representation of the software activity at a glace. However, for some users, window thumbnails do not appear when hovering over the taskbar icons.

This often indicates a failure or corruption of the settings responsible for displaying thumbnails. What can be done in this case? Here’s a check list

Windows 10 doesn’t show taskbar thumbnails

If you haven’t seen the thumbnail previews from very beginning, it’s worth checking if you have them enabled.

Check if taskbar thumbnail previews enabled

  1. Press the Win+R shortcut keys and type systempropertiesperformance in Run.
  2. Click on the Settings button under Performance on the Advanced tab.Settings Buttons Under Performance On Advanced Tab
  3. In order not to bother too much, select “Adjust for best performance”, apply it, and then select& apply  the default mode again, “Let’s Windows choose what is best for my computer”.Fix Windows 10 Doesn't Show Taskbar Thumbnails
  4. This should help.

However, if it doesn’t help, that could mean that Windows 10 doesn’t show taskbar thumbnails due to settings in the registry. You need to undo them.

Change Registry settings to show taskbar thumbnails

Open the registry editor with the regedit command and expand it to this branch:

Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced

On the right, look for the DWORD parameter DisablePreviewDesktop and delete it.

DisablePreviewDesktop

If the parameter is missing, skip this step and go to the key:

HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Taskband

On the right, find the NumThumbnails parameter and change its value to 10 in hexadecimal or 16 in decimal.

NumThumbnails

If the parameter is missing, create it with the specified value. The NumThumbnails parameter type must be DWORD.

After completing these steps, you need to restart the computer.

One more thing

If this did not help to restore the visibility of thumbnails of running applications, you need to perform the standard troubleshooting procedure for typical problems. Scan the system for missing and damaged files with the sfc/ scannow command, and roll back the system to the previous restore point.

Author: The MFTNEXT Team

The MSFTNEXT project is a small team of authors who love to engage with the latest technology and gadgets. Being passionate Windows bloggers, we are happy to help others fix their system issues.

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