This is one of those search & destroy problems. Possibly a bad driver. Go to the device manager & disable the lan card (if it is there) or uninstall it. Then see if the problem goes away. If so the card is your problem. If not let us know.
sorry if I read you wrong,have you checked that the default isn't set to Automatically restart after error?Right click My Computer,and click properties.On the advanced tab ,under start-up and recovery click settings. The under system failureclick to clear 'automatically restart' checkbox and then hit ok.When you sutdown the blue screen shouls stay displayed long enough to record the error info.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS