Can you convert retail key to Volume License?
I have just purchased an Asus Transformer. This comes with Win 8.1 and it is possible to upgrade to Win 8.1 Pro using an upgrade key. I dont want to pay £99 for the retail version when we have already got volume licences. I have tried to input my VL MAK key to do the upgrade but it says it is invalid as the installed version is retail.
So is it possible to convert a retail version of Windows 8.1 to a volume licence version so that I can upgrade the Asus without shelling out £99?