Windows keeps asking for activation.

Hi Forum !
Ive used Parallels Desktop for a while now, running my bootcamp partition. And until now, everything has been perfect.
Usually I am working in Parallels, but sometimes I have to run Windows directly from disk.
But lately Windows has begun to ask for product activation, because I am changing hardware...
This have not been a problem before ? WTD?

 

Could you please provide us with the error message which you get from Windows VM?