[Shin]

Warning: I will NOT take any of the complaints/shit because you decided to do this.

Step ONE: Open up Notepad.
Step TWO: Type in cmd.exe and save the Notepad file as cmd.bat
Step THREE: Open up the cmd.bat file and type in shutdown -i
Step FOUR: A dialog box should open up, and then do whatever you want. (Don't forget, uncheck the box saying 'Warn users of this action')
Step FIVE: Once it says you can press OK, press OK
Step SIX: There you go, everyone's (including your teacher's) computer should shut down.

[KuhakuWolf]

and when the cmd is blocked by the admin?

[Silence]

and when the cmd is blocked by the admin?

Then you're fucked.
This is legitimately a useless method when most schools have cmd blocked, and if they don't you should really rethink your education environment.

[mothered]

This is legitimately a useless method when most schools have cmd blocked

Furthermore, most run on restricted privileges/guest accounts and have rules defined to block scripts of this nature from executing.

There's a lot I can say, but let's leave It at that.

[KuhakuWolf]

and when the cmd is blocked by the admin?

Then you're fucked.
This is legitimately a useless method when most schools have cmd blocked, and if they don't you should really rethink your education environment.

Guess your right on that one xd

[Skullmeat]

As others have said, on most systems this will not work at all. Most schools have command blocked. Even if they don't, this will only shutdown the computer you run it on. It isn't a remote command. There are ways to issue a remote shutdown to a computer, but they involve changing security policies via the registry, which no school in their right mind would give you access to.

[Num5kull]

When I was in school all the machines booted from a single computers autoexec.bat.
@echo hacked by xxxx
@pause
Good times

Have a nice day

[Inori]

There's workarounds when command prompt is blocked (e.g. writing a program in a compiled language that executes shell commands), but this is fucking useless. Another way to shut down school computers is called pulling the plug for the power supply.

shutdown /i (the option flag on windows isn't -) won't do shit if you don't have administrative privileges, as well. Default Microsoft security policies won't allow arbitrary users to control other machines remotely.

[Skullmeat]

There's workarounds when command prompt is blocked (e.g. writing a program in a compiled language that executes shell commands), but this is fucking useless. Another way to shut down school computers is called pulling the plug for the power supply.

shutdown /i (the option flag on windows isn't -) won't do shit if you don't have administrative privileges, as well. Default Microsoft security policies won't allow arbitrary users to control other machines remotely.

Exactly. 7/8/10 have those policies disabled by default. If you attempt to send those commands you will get an "access denied" even if you are administrator. They must be enabled via the registry on all target machines as well as the machine issueing the commands.

[Skullmeat]

When I was in school all the machines booted from a single computers autoexec.bat.
@echo hacked by xxxx
@pause
Good times

Have a nice day

First off, no. Autoexec.bat is a file used to call various drivers and settings on startup. It does not control anything related to networks or network booting.

Second, no. Autoexec.bat is deprecated and is only used on MS-DOS and Windows 9x based operating systems. The NT equivalent, autoexec.nt is ignored on startup and is only loaded when an MS-DOS based program is called.