Published at LXer:

Almost every laptop on sale today comes equipped with the Kensington security slot on the side or back, through which you can connect a theft-deterring locked steel cable. The system's down sides are (a) that a would-be thief can damage or destroy your equipment trying to yank the cable out, and (b) that you have to buy the cable separately. As an alternative, the free software utility Adeona won't preemptively deter theft, but it will help you track down your stolen equipment and better the chances of its recovery by police.

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