To protect yourself from identity theft, make sure that you have a strong password that is difficult to guess. Be sure to never include any publicly available information in your password, such as your name, your birthday, or your address. Also, only install programs from sources that you trust and be wary of fake sites that ask for your personal information. To protect your computer from physical theft, you can use a computer lock (usually priced between $5 and $30). Attach the lock to a heavy, solid object (such as a desk) and connect the other end to your laptop. You can also buy laptop tracking software, which sends out a beacon through the Internet to help you find it in the event of a theft.