Windows XP Recovery Console / Windows Recovery Environment (WinRE)

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

http://blogs.msdn.com/b/winre/archive/2006/10/20/where-are-recovery-console-commands.aspx

Windows XP Recovery Console Equivalents in Windows Vista (http://technet.microsoft.com/en-us/magazine/dd367881.aspx?pr=blog)