VIRTUAL MACHINE

THERE MANY SOFTWARES SUCH AS VIRTUAL PC 2007 , VMWARE etc USING WHICH WE CAN INSTALL AND USE ONE OPERATING SYSTEM INSIDE OTHER OPERATING SYSTEM , LIKE A PARALLEL DESKTOP WITHOUT REBOOTING.

I FEEL VMWARE WORKSTATION IS THE BEST SOFTWARE FOR THE ABOVE PURPOSE.
YOU CAN HAVE A FASTER INSTALLATION , FASTER USE & BETTER COMPATIBILITY THAN VIRTUAL PC 2007.
( I INSTALLED UBUNTU , KUBUNTU, FREESPIRE , BOSS LINUX, REACT OS & SOLARIS 10 OPERATING SYSTEMS INSIDE WINDOWS XP USING VMWARE SUCCESFULLY.)
(BUT WHEN I TRIED THEM USING VIRTUAL PC IT TOOK A LONGER TIME TO INSTALL AND WAS UNSUCCESSFUL TOO,...)