Home Ed. Settings : Alarm options Reference

the Alarm options


When PREDATOR has locked your session, if somebody types some key(s) on your keyboard, or moves the mouse, PREDATOR displays the password dialog with a countdown.
If this person enters invalid passwords, or if the password dialog times out, PREDATOR triggers an alarm.


This parameter defines the conditions by which PREDATOR will display the password dialog upon detecting keyboard or mouse activity.
There are 4 possible values in this dropdown list:
  • Low: show the password dialog if at least 5 keys are pressed rapidly, or if the mouse is moved by several inches
  • Medium: show the password dialog if at least 3 keys are pressed rapidly, or if the mouse is moved by about 1 inch
  • High: show the password dialog as soon as a key is pressed, or if the mouse is moved by a very short distance
  • Disabled: never show the password dialog, do not trigger any alarm: you won't be notified if somebody tries to access your computer. You won't be able to unlock your session with a password either, so think twice before disabling this feature.

Play sound file

Select the audio file (*.wav file) which will be played in case of alarm.

Beep system speaker

If you did not select any audio file as suggested above, check this box to produce a series of beeps in case of alarm. Note that if this box is checked, a series of short beeps will also be emitted during the last 10 seconds of the countdown displayed by the password input dialog.


Tell how many times you want to play the audio file, or how many beeps you want to produce on the system speaker in case of alarm. If you select 0 (zero) then no sound will be produced during the alarm.

Picture file

Select the picture (*.jpg or *.png file) which will be displayed while your desktop is locked. If you leave this input field blank, PREDATOR will mask your destop with a black screen.

Picture layout

Select the way PREDATOR will display the picture, choices are the same as when setting the desktop wallpaper.

Password trials

Set how many invalid passwords may be entered before setting off an alarm.


PREDATOR can run custom commands when events are triggered in response to specific actions and states. For example, you can shutdown your computer at a scheduled time.

Several step-by-step configuration procedures are available in the HOWTOs section of the Documentation.


PREDATOR supports the following events:
  • Password : triggered when PREDATOR displays the Password Dialog. Useful to take a picture of the person who tries to use your computer.
  • Alarm : triggered when the alarm conditions (as defined above) are met. Useful to take custom security measures, for example: send mail, shutdown the computer, etc.
  • Monitoring is on : triggered when PREDATOR starts monitoring your PC, either because you just started PREDATOR or because you resumed monitoring with the menu.
  • Monitoring is off : triggered when PREDATOR stops monitoring your PC, either because you paused monitoring with the menu, or because you unlocked your computer with the Password Dialog.
  • Locked by key : triggered when PREDATOR locks your desktop after detecting that your usb flash drive is not connected.
  • Locked by schedule : triggered when the system time reaches the end of a scheduled period.
  • Unlocked : triggered when PREDATOR unlocks your desktop, either because you plugged in your usb flash drive, or because you entered the correct password, or the system time reaches the beginning of a scheduled period.
  • Startup : triggered when PREDATOR starts.
  • Exit : triggered when PREDATOR stops, either because you selected Exit from the menu, or because you shutdown Windows. In the later case, your command may not have the time to complete before system shutdown.

Select the desired event in the drop-down list, then set the corresponding action below.


You can associate an action to each event. PREDATOR will execute it each time this event is triggered.
In most cases you'll keep the preconfigured "default" action, because usually there is no need to change it.
  • Default : execute the default action defined by the program.
  • Lock : lock the desktop.
  • Unlock : unlock the desktop.
  • Shutdown : shutdown the PC. You may associate this action to the "Locked by schedule" event if you want to automatically turn off the PC at a given time.
  • Restart : close all sessions and restart Windows.
  • Hibernate : suspend Windows and enter hibernation.
  • Logoff : close the current session.

Warning: Think twice before changing the primary action, otherwise you may end up by locking your computer.
For example, DO NOT associate the "Lock" action to the "Unlocked" event !


PREDATOR has a built-in weekly scheduler where you can define your working hours. Out of these hours, even if the USB flash drive is inserted, PREDATOR will trigger "Locked by schedule" events and take the appropriate action, as explained above. The next two settings control the behaviour of the scheduler.


Check this checkbox to enable the scheduler. You'll configure the working hours in the scheduler window. If you need to work later than usual, uncheck this option to disable the scheduler.


When you start PREDATOR out of the scheduled working hours, it will wait the number of seconds defined in this field before issuing a "Locked by schedule" event and locking your desktop. This will give you a grace delay to quickly open the Preferences and disable the scheduler. The default delay is 60 seconds, however you may set a larger delay if your PC takes longer to open your session otherwise you won't have the time to open the Preferences window.