about the whole remote shutdown thing...
I don't know if anyone is still looking at this thread, but if you're going to do a remote shutdown with XP, I've noticed that a certain security setting has to be in place.
Go to Start > Programs > Administrative Tools (provided that it's there) > Local Security Policy
In the little tree to the left, make sure you go to the Security Settings > Local Policies > Security Options menu. Then scroll down to where you see "Network Access: Sharing and security model for local accounts", and set it to Classic mode as opposed to the Guest only mode.
This allows any local users to log on remotely, then you can use a tool like <a href="http://www.sysinternals.com/ntw2k/freeware/psshutdown.shtml">psShutdown</a> to log in as that user and shut 'em down.
Granted you'll need a local admin account on that machine and know the password, so that might not work at your school, but it's useful to know for other purposes.
If nothing else, while you're at school, try a command like this:
net send * Help, the principal touched me like Michael Jackson!
That's always fun (we got in trouble back in school for playing with the old winpopup on some Win*5 machines).
Now, the only problem is that there was a vulnerability in the messenger service (which delivers the net send commands), and Microsoft solved the vulnerability by sending out a patch that disabled the serivce by default. However, your school might have the service on so they can send out outage notices or what not. Either way, it's worth a shot. Oh, and btw, any message you send out will have the host name on it that sent it, so do it from your friend's computer.
How to turn off Simple File Sharing in XP Pro
How to turn off Simple File Sharing in Windows XP Professional:
Open up a folder (double-clicking on My Computer will do). On the menu bar, go to Tools, then Folder Options...
Go to the View tab, and then in the Advanced Settings box, it will be the last item. It will say <I>Use Simple File Sharing (recommended)</I>. Uncheck the box to disable it.
Now as for the whole remote shutdown fix, I dunno about that. The security option thingy in Post #46 worked for me.
Admin Tools on Start Menu
It's not there by default. First, make sure that the account you're using has admin rights. Then, right-click on the taskbar and select Properties. Go to the Start Menu tab, and click the Customize button for either version of the Start Menu you're using (XP or Classic).<BR>
<BR>
If you're using the <B>XP Start Menu</B>: After clicking the Customize button, go to the Advanced tab of the menu that comes up. In the box entitled Start Menu items, scroll all the way to the bottom to where you see the item System Administrative Tools, and change the option to display them.<BR>
<BR>
If you're using the <B>Classic Start Menu</B>: After clicking the Customize button, look at the "Advanced Start Menu Options" box and the Display Administrative Tools item should be the first checkbox.<BR>
<BR>
Hope that helps/works.