If it’s already enabled, all you need to do is “mouse hover” (or place you mouse over without clicking) any icon on your taskbar, and a little mini-prview window will show up with the contents of that window.īut what to do if it doesn’t work… No fear, turning that feature on is pretty simple, but first, a few notes: Windows 7 is a major release of the Windows NT operating system developed by Microsoft. Windows Aero Peek (also called Desktop Preview) is a cool new feature in Windows 7 that lets you “sneak” a preview of windows that are on your taskbar so you can more easily sift through the multitude of windows you use daily.