I just recently installed the Windows 8 consumer version on a Windows 7 starter system.  I like the performance of Win 8 so I tried to install a Win 8 Pro with media player but recieved an error about having  the consumer version.  Walmart has upgrades of Win 8 Pro for $70 but there is a different version costing $199.  B&H Video.com has this version on sale for $99.  I will purchase it but first I am dling versions to find the correct one that works.  Since at the moment I only have one working PC, I'm not going to goof around because Win 8 Consumer Evaluation is running just fine.