This OSR tool loads a kernel driver and crashes and reboots the computer in 1sec.
“You say the drivers you develop aren't doing a good enough job of crashing your system and you need a way to force a system crash? Here's that way: BANG! Run BANG.EXE and a dialog box with a big red button reading "Crash Now!" appears. Click the button and... BANG! Or, change your mind and click on the little "Never Mind" button. Somebody's needed to write this utility for years. And who would you expect it to be other than OSR?”
GeSWall successfully prevents system crash by preventing driver start.