Windows only: Free computer-tracking application LocatePC is a lightweight application that can save you a hefty amount of money if your laptop, or even desktop, falls into the wrong hands. Running as a nondescript background app, LocatePC can quietly email you at regular intervals or, more helpfully, whenever your IP address changes. That could be a pain for those behind cable connections and the like, but with a simple email filter or a little router-tweaking, you’ll only be bothered by those emails when you really need them. LocatePC is a free download for Windows systems only. For more laptop lock-down tips, check out Adam’s quick guide to thief-proofing your laptop.