Fast way to destroy a computer manually[Black Hat]

So simple, but yet so deadly.
Simple way to blow up windows operated PC.
Lets say your in front of a computer(Windows only) and you forgot your virus flash drive,
Kicking it will take some time, so I wrote this.
10 to 60 seconds
Won't work on school because they have "magic card" which revive the computer every time he come up.
And you must be admin.

Lets start:

Way 1(10 sec):
"my computer" > "C:/" > delete "ntldr" > Restart computer.
Simple eh?
But sometimes you cant see ntldr file, because its hidden,
So we move to "way 2" which will make us able to see hidden files,
Only If we can't see ntldr.

Way 2(50 sec)
Go to any folder(in our case C:/)
To see hidden files:
1.On the Tools menu in Windows Explorer, click Folder Options.
2.Click the View tab.
3.Under Hidden files and folders, click Show hidden files and folders.
Then "my computer" > "C:/" > delete "ntldr" > Restart computer.

Windows 7 way(20 sec)(Works XP)
Since way 1 and 2 does not work on windowns 7 try this:
Task manger(Alt+Ctrl+Delete) > Applications tab > "New Task" > type in "system" > "OK" > Delete all files in the folder that just opened.

Credits: alonalon