KeyLock is a program to lock your computer with an USB Flash Drive. It is a freeware PC locking application that's easy-to-use.
Here are some screenshots to illustrate the features and user interface of this application:
Block computer when removing a defined USB device, CD. Screenshot of KeyLock - 289px · 588pxUnlock your PC only when you connect a selected USB flash drive. Screenshot of KeyLock - 498px · 240pxCustomize the appearance of your screen when locked. Screenshot of KeyLock - 471px · 320px
Prey
WinLock
WinLock Professional
Screen Blur
KeyLemon