Bruce said:
Limitation? Please name any other operating system that allows
one to downgrade to an older version.
I don't know; can you run Windows 98 setup from with Windown ME? Can you
run Windows 95 setup from within Windows 98? Can you run Windows NT
setup from within Windows 2000?
In most cases you would not want to revert to an earlier O/S. In the
case of XP it's a common request (with good reason), especially on a big
corporate network. The XP setup program has everything needed to run
WinNT32, create a new boot partition (boot means "system" in Microsoft
language) and allow installation of Windows 2000. The system disk
(startup disk) would still have the XP loader, but that's all; you can
dual boot and with today's hard drive sizes, everyone is happy.