Similar Problem
When I built my latest PC I had the same message, but it appeared in a message box with xp still up and running. The standard MS box came up with the "send report" " & "don't send" buttons. Never used it before, but in desperation after doing all of the stuff that Mac the Knife suggested, I pressed the send error report button, a solution came back within seconds, the driver for my Sony Ericsson phone stand required an update, did that and have never seen the fault again.
I was not getting a shutdown however.
I followed all the MS knowledge base advice, but I would never have figured on that one driver causing the problem.
I had been using the phone stand on previous build with no problems?
Follow turn it offs advice to try and find the offending part then follow Macs advice and if the problem is still there, update drivers, especially the new monitor.
Can be very obscure, good luck!