Step 1:  Right click anywhere on your desktop and then left click “Create a Shortcut”.

Step 2:  Type in shutdown /p

Step 3:  Call it Power Off  (or anything else you like).

Step 4:  Right click on your new desktop shortcut, left click properties, then choose change icon;  I like the red power off icon myself, but it really doesn’t matter.

Step 5:  Right click the new shortcut, pin to start menu.

Step 6:  Go to Start Menu, find the shortcut, right click it and left click pin to taskbar.