In the CNET article , Microsoft warns users who use vitalization solutions for upgrade from Windows XP to Windows 7.
"Microsoft does not endorse moving the user's desktop from a physically loaded OS into a VM as a consumer solution, because the vast majority (more than 90 percent) of consumers do not license Windows under a license that would allow them to transfer Windows into a virtual machine, move Windows to a different machine, or run a secondary virtual machine that is not running XP Mode on the same machine," Microsoft's general manager, Gavriella Schuster, said in a statement to CNET. "Without these license rights, most consumers will not be properly licensing Windows when using the virtualization features of Parallels' product."
The warning affects solutions proposed by VMWare, Parelllel, and probably Zinstall
Good News : PCmover and PickMeApp use different approaches and therefore are legitimate solutions