i have the same problem at school.
How i fixed is was by getting into c drive. (at school normally blocked but i did i by right click on a few thing and selecting "open file location" somtime it will get u in. another way was by typing "C:" into the search bar in your documents).
look around and find where it is
close it in taskmanager by right clicking and choose "end prosess tree" (do it for all the ab tutor files running)
then change the name in C drive to a jpeg or another file type instead of exe
You can also do it by right clicking in task manager the choosing "proprieties" and you can change the name throught there
When u want it back rename it to a exe and restart the computer (sometime it will glitch if u don't restart)