Supported in various Windows platforms that support 64-bits, such as Windows XP, Vista, Server, 7, 2008, and 2003 systems, this utility is a free to use application. Predator Free Edition (64-bit) is intended to help users prevent unauthorized access to their systems. The tool accomplishes this by using an USB drive to lock and unlock the system. You need to set a password to enable access to the system. Passwords can also be set for specific applications or for the system as a whole. When a user logs in, you can set up an optional sound alert. The password can be used to unlock the system, in case you lose or misplace the USB drive.