Locking your PC while you are away is a basic security measure that is often required by employers on the workplace. Yet, during my corporate career, I have seen many people not do it. May be the solution is to use some kind of automated system that would lock down the computer as soon as you leave your station. The TF2000 Proximity Sensor does just that. It uses a sonar to detect your presence or absence.
Unfortunately, it is not smart enough to recognize you and unlock the PC when you come back – you will have to enter your password normally.
Also look at the Wireless PC Lock
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