I have a New Windows 8 PC and am in the process of transferring Applications to it. Will probably take a few months, so for a period of time I will have applications running on two machines

I have just Deactivated my Licenses for my old machine, and then was going to Activate them for thr New Machine, but when I go into Manual Activation, a message comes up saying 'Coming Soon'

How do I Reactivate My Licenses on the New Machine

Also, over the coming months, I will want to develop on both machines (Not at the same time though)

I thought you could Deactivate from one machine, and then Reactivate on another machine ?

Also saw a message about a 10 day chnageover .  Can I still use SF on the two machines until I get everything ported across

Appreciate an URGENT reply as I cannot do anything right now