Active Lock can convert any USB storage device into an access key for Windows. Access your Windows computer in an easy, fast and secure way by using USB drive. When you unplug your USB drive, the computer is locked. Active Lock is very easy to use. All you need to do is insert your USB key drive, click on "Enable" and restart the computer. One USB key drive can be configured to access multiple computers. System requirement: Windows 2000/xp/2003. 15-day trial.