hey guys here is a trick to shut down ur school computers automatically without knowing them..
follow this simple steps

Step 1- Go to "Start"

Step 2- Right click on "My computer" then go to "Manage"


Step 3- Now right click on "Computer Management
" and go to "Connect to another computer"


Step 4- Now click on "Browse"

Step 5- Now click "Advanced"


Step 5- Now click "Find now" and it will start the search for network.

Step 6- So when you find the computers with network in school you will right click on "Computer Management" and then click on "Properties"

Step 7- Now click on "Advanced"


Step 8- Now click on the third "Settings"


Step 9- Now you have to uncheck all the boxes..


Step 10- Okay this is last step click "Shutdown" and choose what you want e.x "shutdown" and then you are done.........