

Go to personalize and select an Aero theme. Lastly, if that doesn't fix the problem, make sure that your display settings for Windows is set to Aero Theme. Themes still greyed out? Force Enable Aero! Some drivers simply don't support WDDM(Windows Display Driver Model ), so you have to force enable Aero via a registry key. And check the checkbox that says “Use Aero Peek to preview the desktop”.

Click on the Taskbar tab (See screenshot).Right-click on the Start button, and click properties.How do I enable Aero Peek to preview my desktop? How do I show thumbnail previews over taskbar icons in Windows 10?.

