Blue screen of death- funny prank

Have u seen BSOD(Blue screen of death) this is a nightmare to all windows users.Whenever an incompatible hardware or software is installed ,sometimes due to driver conflicts our computer shows BSOD  and immediately crashes to protect our system, then system will dump all of its memory to a file on disk. Data in memory would then be lost but in some circumstances it could be retrievable from the dump file.To know more about BSOD click this link Wikipedia .

You can play a prank on your friends computer by showing the BSOD to appear on his computer using the keyboard.All you have to do is tweak the registry settings .

For USB keyboard:-
Open regedit navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\kbdhid\Parameters 


For ps/2 keyboard:-
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\i8042prt\Parameters

Now right-click on the right-hand pane and add a new DWORD key name it  CrashOnCtrlScroll, giving it a value of 1.Now restart the computer for the changes to take effect.Now you can invoke the blue dragon by holding down Right CTRL and press scroll lock twice.See your friends emotions...