Zone Alarm should take care of that.

I am definitely taking part in this.

If it is a small School system as mine was
boot into safe mode
log in admin (hoping it is unsecured in safe mode as mine was)
then change the admin pass.
Presto admin privileges.

I am a writer and that is as far as it goes.
No pics. No further discussion.
Feel free to do otherwise but I respect privacy.