Canid117 said:
If your school system uses Windows Xp there is a wonderful little trick you could try.
Step 1) Take a screenshot of the normal screen with no programs running.
Step 2) Set that screenshot as the desktop background using something along the lines of MSPaint.
Step 3) Open up the task manager and end the process "Explorer.exe"
Step 4) Close the task manager.
Step 5) ???
Step 6) Profit!
Why end the explorer process? If she's not that computer literate you can just hide the desktop icons. Then no matter how many time she reboots the 'problem' is still there.
I did something like this to my computers teacher once, the entire class got to listen to a two day lecture about doing things like that to school property. That means for two days we didn't get a damn thing done either.
Seriously, just do some work or read a book. I got stuck in a study hall I shouldn't have even had. I spent most of my time reading a dictionary.