I often see the same useless advice which assumes the error is corrupted files or whatever. I've tried all the usual advice, it just doesn't work. If you’re uncomfortable with editing the registry manually, you may use an app instead.I have exactly the same issue in 2020 on a new laptop with Windows 10 Home.
There are apps that allow you to disable Taskbar thumbnail previews but they essentially do the same thing i.e., edit the Windows registry. Make sure you restart File Explorer after you delete the value. You should avoid changing its value to something else and instead remove it from your registry. If you ever want to get your taskbar previews back, you need to delete the DWORD value you created. Once your desktop looks normal again, hover your mouse over any app icon in the taskbar and you will no longer see a preview. Your desktop background, system tray, and taskbar will disappear and reappear during the process. Click the Restart button at the bottom and wait for File Explorer to restart. To restart File Explorer, open the Task manager and in the Processes tab, look for Windows Explorer and select it. In the value data box, enter the following 41fffffeĬlick Ok and then restart File Explorer. Name the value ExtendedUIHoverTime and double click it to set its value. Right-click the Advanced key and select New>DWORD (32-bit) Value. If you don’t see it, you can create it yourself. If it’s there back it up before you modify it. Under the Advanced key, look for a value called ExtendedUIHoverTime. HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced Once you have the editor open, go to the following location. Use the Win+R keyboard shortcut to open the run box and type ‘regedit’ in it to open the registry editor. This hack involves editing the Windows registry so you will need admin rights to execute it. That said, if you think the feature isn’t that great, you can disable Taskbar thumbnail previews on Windows 10 with a registry hack. We’ve done a post that shows you how you can make this preview larger if you don’t like the default size. When you hover your mouse over the Taskbar icon of a running app, you get a small preview of it.
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