How to install a font under Windows?

• Under Windows 8/7/Vista
  Select the font files (.ttf, .otf or .fon) then Right-click > Install
  
• Under any version of Windows
  Place the font files (.ttf, .otf or .fon) into the Fonts folder, usually C:\Windows\Fonts or C:\WINNT\Fonts
  (can be reached as well by the Start Menu > Control Panel > Appearance and Themes > Fonts).