Windows only: Next time you leave your laptop unattended, turn on freeware program Laptop Alarm. Laptop Alarm sets off an alarm to alert you any time someone tries to log off, shut down, or disconnect your power supply or USB mouse without entering your password. Laptop Alarm is similar to Mac-only alarm iAlertU but—let’s be honest—with much less pizazz. (iAlertU is motion-sensing, for chrissake!) Either way, neither software is foolproof by any means. Laptop Alarm won’t prevent anyone from grabbing your computer and running, but at the very least it might sound off the alarm in enough time to give you a fighting chance to chase down the bad guy. (The only true method of theft prevention is never leaving your laptop alone.) Laptop Alarm is freeware, Windows only. For more advanced laptop theft fun.