shut down friend's pc without touching it!!

hi friends!!
i have a new trick shut down your friend's pc witjout touching it.... :)
it so simple. you can easily do this.....
here is a trick:
1.open command prompt using ctrl+shift+enter.
2. type shutdown -i.
3. a net window is open, click on add and put friends ip on it....
4. you can also add comment and time.
do and watch, enjoy hacking.....
princy gupta
MMEC