Although Mac OS and various Microsoft Windows releases can function as "live CDs" they are not referred to as such. This may be because these systems are only intended to be run from CD for troubleshooting, repair and installation. There are a growing number of Windows-based utilities like Windows PE, Windows RE and BartPE that resemble and function as LiveDistros, however.

http://en.wikipedia.org/wiki/LiveCD

BartPE:
Bart's PE Builder helps you build a "BartPE" (Bart Preinstalled Environment) bootable Windows CD-Rom or DVD from the original Windows XP or Windows Server 2003 installation/setup CD, very suitable for PC maintenance tasks.

It will give you a complete Win32 environment with network support, a graphical user interface (800x600) and FAT/NTFS/CDFS filesystem support. Very handy for burn-in testing systems with no OS, rescuing files to a network share, virus scan and so on.
This will replace any Dos bootdisk in no time!

Microsoft only provides Windows PE to OEM and Enterprise customers. So the small companies and end users do not get Windows PE. I think this is really bad. With PE Builder they can build a Bootable XP CD-Rom (called BartPE) to use for maintaining their systems.