Upgrade to windows 8 standard to windows 8 pro

[Generalkenz]

my new PC has got windows 8 standard. I want to upgrade to windows 8 pro. I have a windows 8 pro product key. I want to know how i can use my windows 8 pro product key to upgrade. Do i need to upgrade via windows anytime upgrade? or what? Need help asap

 

[mishra]

Try this:
http://www.zdnet.com/everything-you-need-to-know-about-windows-8-upgrades-faq-part-2_p2-7000008775/
and
http://technet.microsoft.com/en-us/library/jj203353.aspx#editions