no lock is fully secure, they can all be removed in some manner. It's good for stopping people from running away with your PC if you turn around for a minute, I would make any bets on keeping it beyond that though. This is why no lock comes with built in inusrance, the locks are light weight, and the Laptops you're connecting them to can have the lock seperated from the body pretty simply. Some of the Targus locks are super cheap and you can just pull them apart. Alarms are good only if someone is going to do something about the alarm going off.