It means one of the Kernel Mode programs are faulting and your system is thus shutting down to save it from being damaged more.
In %systemroot%\Documents and Settings\All Users\Application Data\Microsoft\Dr Watson folder can you find User.dmp and DrWtsn32.log files?
Attach them back.
In %systemroot%\Documents and Settings\All Users\Application Data\Microsoft\Dr Watson folder can you find User.dmp and DrWtsn32.log files?
Attach them back.