While using Windows 10/8/7, you may need to cycle or flip through your taskbar thumbnails. When you move your mouse cursor over the taskbar icons, you see the thumbnail views. While most of us end up using our mouse cursor to do it, there is a way to do it using the keyboard.
View taskbar thumbnails using keyboard
Here is a simple to achieve the same with the help of the keyboard.
Keep pressing the Windows+T key and you will see the focus shifting from the left most icon and moving towards the right side. In the image above, the focus is on the Firefox icon and I have pointed out to the white dot below the Firefox icon.
Alternatively, you could just press Windows+T once and leave.
Then use the arrow keys to move the focus.
Hope this makes working with Windows easier!