“0×00000050″ Stop error on a computer that is running Windows Vista or Windows Server 2008
You receive the following Stop error message on a computer that is running Windows Vista or Windows Server 2008:
STOP 0×00000050 (Parameter1, Parameter2, Parameter3, Parameter4)
When you experience this issue, the computer may restart automatically.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2280072.