Worried about unsavory individuals lurking around your office or home and jacking your computer gear? Have no fear! With the help of your Windows PC, webcam, some free software, and this handy tutorial from Simplehelp, you can set up a reasonably sophisticated DIY security system. The core of the tutorial is Dorgem, an open source utility that captures images from your webcam and can save images based on "storage events," e.g. every 30 seconds or every time it detects motion. Since having photos of your intruder on your computer isn't very useful after the computer is gone, Dorgem has the ability to send the files to an external server via FTP or HTTP, or hand the files off to another program. The tutorial also covers more advanced techniques, like setting up multiple webcams and hiding your webcam from sight.