Laptops with the best battery life
Microsoft to offer Windows 8 upgrade for just $39.99
Microsoft have said that existing Windows users can upgrade to Windows 8 Pro for $39.99 (£25) later this year.
If your PC is running Windows XP, Windows Vista, or Windows 7 you will qualify to download an upgrade to Windows 8 Pro for just $39.99. This offer will be available across the world in 131 markets.
Upon visiting Windows.com users can purchase an upgrade to Windows 8 Pro using the Windows 8 Upgrade Assistant.
Once Windows 8 has been downloaded users will be able to create their own bootable USB or .ISO file which can be burned onto a DVD for upgrade and backup purposes. There is also the option to purchase a backup DVD for $15 (about £9.50) plus shipping and handling.
A fully-packaged DVD version of Windows 8 Pro will also be available for $69.99 (£45) throughout the promotion.
The Windows 8 upgrade offer will run until 31 January 2013.
Prices for system builders
If you're not upgrading from a prior version of Windows and are building your own PC or installing Windows 8 in a virtual machine or a separate partition, you will be able to purchase and install the Windows 8 and Windows 8 Pro System Builder product instead.
Get Windows Media Center for free
After upgrading to Windows 8 you will be able to add Windows Media Center for free through the "add features" option in Windows.
Download Windows 8 Release Preview