Microsoft has announced that upgrades to Windows 8 from previous versions of the operating system will go for $39.99 via download and $69.99 if purchased in a store.
The low-cost upgrade is positioned as a promotion available only from the time Windows 8 ships this fall until Jan. 31, 2013, Microsoft said. Users running Windows XP, Windows Vista or Windows 7 will be able to download Windows 8 Pro in 131 markets.
Microsoft also is allowing users to add Windows Media Center for free after the upgrade. In addition, upgrading customers have the option of purchasing a backup Windows 8 DVD for $15 plus shipping and handling.