DOS is a basic coding language. if i have read right it is used for windows
here is how to turn off a computer
shutdown -s -t(put time here in seconds NO PARENTESIS) -c(comment you can leave blank)
-----------------remote shutdown-------------------
i do not remember the DOS code for this but windows has a program that you can turn off your friends computer log them off or restart in the comfort of your own home here it is
1. go to run then type: shutdown -r or remoteshutdown either one should work
2. it will open a program then type the victims ip (it uses LAN ) and hit enter then watch your friend go MAD