Hi Steve-123, Please follow the steps mentioned below to upgrade to Windows 8 pro on your computer. Please let me know if this helps.
Just received a new Dell XPS 8500 with Windows 8 factory installed (nice machine too)   I want to upgrade to the full Windows 8 Pro version so I can use Windows Media Centre (which is not provided with the factory installed version of Win 8).   Where/how do I do this without compromising the new computer? I'm confused. There are upgrade disks available now at retail places like Harvey Norman. But are these for Win 7 machines upgrading to Win 8 Pro? Can I use them on my machine that already has basic Win 8 installed?.   Haven't found much useful information on upgrading a factory installed Win 8 to the Pro version on either the Dell and Microsoft websites.   One forum in the UK said that using a retail upgrade disk will shut down all Dell apps preinstalled on my machine (eg. Dell Download Centre). Whoops, don't want to do that.   Any help much appreciated   Steve    
How to safely upgrade factory-installed Windows 8 to Windows 8 Pro