FaiKee mentioned in a post how Office 2013 can be "activated" under Windows 8.1 RTM by transferring SPP store data from an activated Windows 8/Office 2013 to Windows 8.1. Well, I'm a bit stuck and would need a little help on the procedure because it's not entirely clear to me. I mean, which key do I have to provide the OSPP.VBS, for example? And does it work in a Hyper-V installation (for testing purposes)? I installed Office 2013 VL x64 and activated it via KMS emulator under Windows 8 Pro with Media Center (Windows 8 itself is activated with genuine key). Target Windows 8.1 won't have Media Center installed because I don't use it (anymore).