W8------------------>8.1 uPdAtE nOw
According to Microsoft site users can different choice to
"To install Windows 8.1 or Windows 8.1 Pro online, your PC must be running Windows 7. If you’re running Windows 8 or Windows 8 Pro, open the Windows Store by tapping or clicking the Store icon on your Start screen, for a free update to Windows 8.1 or Windows 8.1 Pro....