xbootmgr

http://www.cluberti.com/blog/2011/07/22/using-xbootmgr-to-trace-boot-shutdown-and-reboot-performance-issues/

http://blogs.technet.com/b/markmoro/archive/2011/08/20/dipping-my-toe-into-the-xbootmgr-water.aspx

http://blogs.technet.com/b/markmoro/archive/2011/11/28/xbootmgr-part-2-readyboot-basics.aspx

http://blogs.technet.com/b/markmoro/archive/2011/12/07/slow-windows-7-boot-one-readyboot-fix-that-you-ll-want-to-apply-probably-anyways.aspx