After you adjust everything, go into control panel, and folder options, and make it so you can open things with only one click, because the program on...
This is a different way to control your computer using a laser. Unlike [http://www.instructables.com/id/Control-your-Computer...-with-a-LASER!/ icinnamon's] way, this uses a webcam and a laser to control the cursor on your computer. You can even click by simply turning the laser off for a split second.
Step 1: Download the software and get a laser or IR pen.
First you must download Microsoft Visual C#. After you have Microsoft Visual C# downloaded, download Laser Interaction. The file name will probably be really weird, so rename it Laser Interaction. Now you will need a laser or IR pen to use it. The first picture is a schematic I made of a simple IR pen you can make. I am using a 100 ohm resistor because I am using 5 volts from a USB cable. You need to have a momentary pushbutton switch on it. I used a normally opened switch so when I press the button, it will click. I also bought a cheap $5 dollar laser from radioshack. I'm sure you can find one cheaper, but I love radioshack stuff.