The quickest way to open Device Manager is via its shortcut on the Power User Menu, accessible by pressing the WIN and X keys together. With a mouse, as long as you're updated to Windows 8.1 or later, just right-click on the Start button.
On Windows 10 right click the Windows Start Icon (bottom left of your screen) and Select Device Manager.
From the Power User Menu select Device Manager.
Open the Ports (COM & LPT) section.