PCGuard is an anti-intrusion software to protect access to a computer with a Windows host, whatever the startup mode. PCGuard protects the boot « Safe Mode », the normal startup and startup in guest mode. If a person comes to fraudulently connect to your computer, it will have 30 seconds (default;-)) to enter the password PCGuard otherwise the software off the machine no matter what (even by closing the software through the cross by killing the process in the task manager or by uninstalling the program ^^). This software is quite effective, so it should be used with caution as I would in no way responsible if you use this software for questionable purposes, or if you lost access to your computer.