Windows: how to select different windows

If you have the same application with some instances, like Windows/File Explorer, and if you want to select one window there are many ways:

• put the mouse cursor on the taskbar icon and wait the thumbnail, then click the thumbnail
• CTRL + left click on the program icon (on the taskbar) to switch between windows

But there is another way 

• clicking the program icon to switch between windows

Like the CTRL + left click, but without pressing CTRL.

To do this (you must be admin or from the admin group, elevate Regedit with admin rights):

• open the Registry (WIN+R, write "regedit" without quotes and press Enter) 
• go to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
• you have to create a new item inside Advanced
• Right click > new or Edit > New
• select DWORD (32-bit)
• write "LastActiveClick" as a value name
• write 1 as a value data
• OK
• the new value is inside Advanced, double-click to view (like the following picture)
• quit Regedit