I'll teach you a way out of control in the next exam.
Click "Start" in the lower left corner of the screen; Click "Control Panel"; Click "Security Center"; Click windows Firewall. General school computers turn off the firewall. Now let's open it. In order to prevent the teacher from adding exceptions, we will check "no exceptions" below; Save the settings; When the teacher takes control again, you will find that your computer is out of control; Open the above path again and select "Close Firewall", but don't confirm; In this way, when the teacher comes, you can click "OK", so that your computer will be controlled and will not be found by the teacher; Finally, don't forget to turn off the firewall when you leave the computer room after class.