Go to Start and type in sysdm.cpl and press Enter
  Click on the Advanced tab
  Click on the Startup and Recovery Settings button
  Ensure that Automatically restart is unchecked
  Under the Write Debugging Information header select Small memory dump (256 kB) in the dropdown box
  Ensure that the Small Dump Directory is listed as %systemroot%\Minidump << where your .dmp files can be 
  found later. 
  Click OK twice to exit the dialogs, then reboot for the changes to take effect.