P2V (Phyical windows machine conversion to virtual machine)
I need to know is there any vendor like Dell, HP who provides best & easy way of migration and platform to this machine?
I've read about simplivity in HP, is good for this cause?
Converting a physical machine to a virtual machine is pretty much vendor independent. You can use e.g. VMware's free Converter to do this. Please note that there are additional tasks required after running the conversion, e.g. cleaning up/removing vendor specific drivers/tools, installing VMware Tools, ...