Re/De-activation

Hello, as my Laptop got stolen I'm wondering if there is a way to deactivate my old registration and reactivate it at my new computer (which I don't have yet...).
(I know that I can activate it two times, therefore the activation on a new computer shouldn't be a problem, but I'd like to deactivate the installation on my stolen Laptop anyway, in case I want to make a second installation on an other computer...
And is MixVibes DVS compatible with Windows 7 (32-Bit and/or 64-Bit). If yes, is it possible to use one registration for a windows 7 64-bit and the other one for windows xp) as there is software that does not allow it...
And another one: if I'm using a Dualboot system with 2 different operating systems (therefore CPU ID and all hardware parts are the same) does it count as one or two registration(s)?
(I know that I can activate it two times, therefore the activation on a new computer shouldn't be a problem, but I'd like to deactivate the installation on my stolen Laptop anyway, in case I want to make a second installation on an other computer...
And is MixVibes DVS compatible with Windows 7 (32-Bit and/or 64-Bit). If yes, is it possible to use one registration for a windows 7 64-bit and the other one for windows xp) as there is software that does not allow it...
And another one: if I'm using a Dualboot system with 2 different operating systems (therefore CPU ID and all hardware parts are the same) does it count as one or two registration(s)?