install keys are at no cost and can be found almost everywhere but the activation goodies will not be displayed on MDL. You either own a legit key out of your previous W8 legal installation and use this one for 8.1 or you must wait until other methods are developed like KMS
anybody know program to check valid keys of Windows 8.1,the pidgem i know, i liked any other witch same proposital,THANKS!
I installed win 8.1 with core key then added feature with win 8.1 wmc key then I went to remove the key and add my wmc 8 key I got for free and I get this error Error: 0xC004F069 On a computer running Microsoft Windows non-core edition, run "slui.exe 0x2a 0xC004F069" to display the error text The product sku is not found is the error that's listen when u type in "slui.exe 0x2a 0xC004F069"
You cannot upgrade Core to ProWMC using the "add features" button. You can only upgrade Pro to ProWMC using the "add features" button. I'm not exactly sure what you can add to core using the "add features" button, but it's not your prowmc key.