Alright, here is my situation.

I am a Junior in high school, taking an A+ certification class. There is a fair amount of people that know their stuff with computers, but no programmers except me, and I am paired with the person that knows the most about hardware and that kinda stuff.

There is only 2 hours that this class is taught, each hour has 2 people at one computer so 4 people at a computer in one day, same people every day.

It seems that the people in 1st hour(I am in second) are messing with our computer on purpose trying to annoy us, whats worse is that most of my hour is running around chanting "Down with station 9", which is my station.

So what I need is a good way to get revenge against them on the computer, I have access to go to their computer and log in before they get there or after.

I don't wan't anything malicious or illegal, just a prank/something anoing to do to them to get revenge. I am looking for good non-programming ways to do something interesting to them, I was going to program a few fun things like flipping their mouse randomly every once in a while or error messages whenever they touch a key or use a mouse button, stuff like that, but I wan't something a little easier at first so we can "trade blows".

Today what 1st hour did to us is lock the C:\ drive, I am not sure how they did it, if anyone knows a fix it would help, but it seems they are pretty familiar with windows(we are using winowsNT, every station is the same with hardware/software)

If you have an idea please post, whether it be programming or not.