-Here are a few things one could do on a school computer to have some fun with it... (wasn't sure where to put it so if this is not in the right spot please move it)
This is only for windows sadly
-all of these have been tested by me
-Most school computer have a whole bunch of security installed so that students can't do anything...
1. If your school computers don't allow you to change your background... download Wirm and do it that way... which is the easiest
2. Gain access to the cammand prompt by using either Run>>CMD, and if that is disabled, use linked folders...
a. One way is to right click on a shortcut and click change icon or something that makes it open a list of folders... then, right click any folder on the main drive and click open
b. Another way is to go to any accessible folder Right Click>>New>>Shortcut>>path of drive (C:\ or S:\ etc.)
c. Another way to do this (and an additional fun thing) is to login to the computer without actually logging in... (I'm only sure that this will work for Win2k and im not sure of other versions... when you see the login menu where you tpe your password, click the little questionmark beside the "x"... then with that question mark active click on the word "Password" for example... this should bring up a little yellow box saying: "this is a password field blah blah" right click on that yellowbox and click Print Topic... this should bring up a menu with printer stuff... click Properties then Help... then in the Help window click File>>Open go to any folder, right click it and choose open... this should bring up the start bar... ignore all the errors and close the windows except the login menu which will still be there... now you have full access to the main drive (if this works)
(I suggest you learn the basics of the command prompt)
3. Now that you have access to the main drive it's a good idea to make shortcuts to that drive and other drives... its also a good idea to copy the command prompt to your folder. Also you can now edit the registry! yay! search Google for many fun registry hacks and edits, that will wreak havoc to your school computers. To run the registry simply type regedit into the Run menu... or if that is disabled, find it in your Windows folder... or you can also run it from the command prompt... If it is disabled, no worries! Download a hex editor (Google it) and open regedit.exe in it... then search for a text string of "Disable" it should come up with something like: DisableRegistryEditing. Now... just change the letter "D" in Disable to any other letter and save the changes... Voila! you can now edit the registry
4. Create funny folders... well... in our school on one drive we have about 18 hidden folders, the only way to access through a command prompt since unhiding is disabled... we have Starcraft among many other games installed on there... if your school has Dreamweaver.. then you will be able to create "funny" folders (i'm not sure if it is able to do this from cmd... firstly, open Dreamweaver... make sure you can see the "Files" menu on the right... now browse to where you want your "funny" folder to be... in that directory where you want it to appear there already has to b at least one folder... go to that folder, right click on it and choose "create new folder"... name it " ." (that is: a space and a period without the quotes) if that name is already taken for some weird reason or if you want to create another one name just add more spaces... after you create this folder in Dreamweaver it will automatically move out of the other folder you made it in... and if you visit it in Explorer, it will just refresh the current view... now if you click Properties, the folder will appear to have an infinite size!
To make a different type of funny folder, a more useful one, repeat the steps but name the folder " .." (that is any amount of spaces followed by two periods) this folder will look like it is doing the same thing as the . folder, but in this one you are able to store files... this can be done through the command prompt's commands of copy and paste... i believe this is also the only way of deleting these folders as well... anyways... after you have put stuff inide the .. folder, it cannot be executed from it... sadly... but you are able to copy files back from it and use them... this way the teachers will not be able to access the folder unless they are really advanced in that sort of ...
5. The shrieking sound of doom... there's this one file on google somewhere, (either that or you can write it yourself), when executed (from cmd) produces a very annoying beep from the computer speaker... it continues for the timeyou set it to continue... but if cmd is shut down and account logged off, this sound cannot be stopped until he computer is restarted... it is a very fun thing to try indeed...
-in conclusion i know a couple more great things to do on a school computer but i have homework now and very tired... if anyone else would like to contribute to this list or edit any entries please do =)