There's no built-in way to switch between the windows of the same application. All top-level windows are displayed in Alt + Tab list. I mean if you have two instances of Notepad running, you'll see two windows of Notepad in Alt + Tab window list.
If you activate two windows of the same application in row, you can switch between them with single Alt + Tab press.
Additionally you can press Alt + Ctrl + Tab to display the list of windows, and then use arrow keys to select the required window; press Enter to switch to the window.
You can also use mouse to select a window from this list.
As an alternative way you can use Windows + T: each press activates the next button on the Taskbar (including the pinned, not started, applications). When you reach the required application, press Enter or Up and then use Left and Right arrows to select the required window and press Enter to switch to it.
Definitely Windows + T is slower than Alt + Tab.
Whilst this is not inbuilt into Windows 8, this 3rd party utility maybe useful http://www.premeforwindows.com/ as it aims to speed up switching windows
– Simon – 2013-04-26T09:45:35.7201
An AutoHotkey script following this algo would work.
– Karan – 2013-04-26T17:54:30.250