Aggressive Badware running in memory is going to make the “You May Be Under Attack” window pop back up.  If you can click “OK” and the message does not return the attack is not able to continue with its aggressive behavior.  If however, the message box returns again and again, you are under very heavy attack.  Repelit does not allow that type of behavior to continue.  You must restart your computer if you want the computer clean and the message box gone.