Microsoft previously announced its $39.99 Windows 8 Pro upgrade pricing for existing Windows XP, Windows Vista, or Windows 7 users — a price available exclusively online for those wishing to download the software without a DVD option. Retailers will stock a $69.99 Windows 8 Pro option in stores, one that may be offered as a traditional full version of Windows for those without a previous copy. Both the Windows 8 to Windows 8 Pro and Windows 8 Pro copies will be made available from retailers on October 26th.