Acting on a hunch, I have found this website containing some assembly code that could initiate a cold shutdown/boot. Particularly this snippet: ; store magic value at 0040h:0072h to reboot:
; 0000h - cold boot.
; 1234h - warm boot.
MOV AX,0040h
MOV DS,AX
MOV word[0072h],0000h ; cold boot.
JMP 0FFFFh:0000h; reboot!This renders a 16 byte executable that is detected by McAfee as a "Potentially Unwanted Program." I don't know if it works in Windows XP but it did in it's time (MS-DOS). Being unable (read: wary) to test this I leave it to you guys for now.