The new option, titled Show Window Previews (Thumbnails), allows you to disable the live Taskbar thumbnails feature, which of course is one of the new Aero features that displays thumbnail images of running applications as you hover your mouse pointer over any button on the Taskbar.
Since the thumbnails are very helpful in quickly identifying active tasks and will actually show live operations, such as a download in progress, I’m not sure what advantage disabling it will have.
> based on the instruction above, i already tick the checkbox and save the setting. but, as i hover my mouse pointer over any button on taskbar, there no any thumbnails appear. why? then can u show me an example preview of the thumbnail that should be appeared.
