Microsoft sets the price for a Windows 8 upgrade at $40 • The Register

For all those customers who can’t wait to enjoy Windows 8’s Metro UI, Microsoft has announced pricing and availability of an upgrade package for users of previous versions of Windows.

Customers running Windows XP, Windows Vista, or Windows 7 will be able to purchase an upgrade to Windows 8 for $39.99 during a promotional period that ends January 31, 2013. The upgrade will be available for download from Windows.com as soon as Windows 8 enters general availability.

More info @ :- Microsoft sets the price for a Windows 8 upgrade at $40 • The Register