Microsoft Windows 8 Pro - Upgrade (x64) 64bit for Systems Running Running Windows 7, Windows XP or Windows Vista: [Student/Teacher License] DVD and Product Key This license is for students and school staff only: Authorization required. Running Windows 7, Windows XP or Windows Vista? Upgrade to Windows 8 with Windows 8 Pro Once you install Windows 8, Windows 8.1 is available as a free update directly from Microsoft Encrypt your data with Bitlocker Stay safer with Windows Defender Customize your Start screen with Live Tiles Pre-existing OS License and Product Key Required.