John - Hope you heard abt the Performance monitoring in Windows 7, its got lot of features for us to diag various stages of OS.
Collect the data from,
Computer management -> Performance -> Data Collector sets -> Startup Event Trace Sessions.
You could refer to following post.
http://social.technet.microsoft.com/Forums/en-US/winservergen/thread/473c379f-bbff-479c-b957-1cb4492c5f4b Note: During Diag, performance can hinder.
Hope it helps,
Jagan