Prey is an anti-theft tracking software for your laptop, phone and tablet that lets you remotely locate, lock, wipe and recover it if ever stolen, or simply missing. It is a freeware laptop tracking application that's efficient, light on system resources, user friendly, modern, well-designed and easy to setup.
Here are some screenshots to illustrate the features and user interface of this application:
WinLock
WinLock Professional
Screen Blur
KeyLemon
KeyLock