Microsoft lets you upgrade your earlier version of Windows Operating System to Windows 8 Pro for $39.99. If your PC is running legitimate copy of Windows7, Vista or XP you will qualify to download an upgrade to Windows 8 Pro in 131 markets. Additionally, you can add Windows Media Center for free through the “add features” option within Windows 8 Pro after your upgrade.
Windows 8 Upgrade Assistant makes upgrading simple by walking you through the step-by-step upgrade process from purchase to download and installation. The Windows 8 Upgrade Assistant will provide a detailed compatibility report that lets you know of anything you may have to address before or after the upgrade.
During the process of upgrade you can import data from your earlier windows operating system depends on the version of Windows that you have. From Windows 7 to Windows 8 Pro bring everything along which includes your Windows settings, personal files, and apps. Windows Vista, you will be able to bring along your Windows settings and personal files. From Windows XP you will only be able to bring along your personal files.
Users who prefer to shop at a local store, a packaged DVD version of the upgrade to Windows 8 Pro will be available for $69.99 during this promotion. This upgrade promotion for Windows 8 Pro both online and at retail runs through January 31st, 2013.
You can find more about the upgrade process at Windows official blog.