jason muro: Thanks bro ,for the one who can't use the free key or who want to upgrade in the future ,my suggestion is to buy one genuine key in mskeyoffer com , the price is amazingly low , the key works like a charm .
Ayan Sengupta: want to buy original windows product key at a lower price??
mail at email@example.com
I bought one today, and my windows 8.1 is activated permanently, Thought I'd share! enjoy :)
Ryu Hayabusa: Windows 8 / 8.1 RTM Pro And WMC Offline Activation RETAIL Keys
Windows 8.1 RTM Pro Offline Activation RETAIL Keys
[Windows 8/8.1 Pro Retail Key For 8/8.1]
slmgr.vbs -ipk XFBF8-B4QNT-BYYQH-99R2C-BR9T7
***If any key failed try to use another one****
[Tested working on VM1 24 October 2013]