force a system crash

You need to do control then scroll lock twice, but before you do that you need to setup the keyboard.

http://msdn.microsoft.com/en-us/library/windows/hardware/ff545499(v=vs.85).aspx

Defining Alternate Keyboard Shortcuts to Force a System Crash from the Keyboard

You can configure values under the following registry subkeys for different keyboard shortcut sequences to generate the memory dump file:

• For PS/2 keyboards:
  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\i8042prt\crashdump
• For USB keyboards:
  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\kbdhid\crashdump

The location of that file is in registry

HKLM\SYSTEM\CurrentControlSet\Control\CrashControl\Dumpfile

Use Dumpchk.exe to check a memory dump file

Use Dumpchk.exe to check a memory dump file