The best way to defend against Trojan viruses is to take countermeasure to never get your computer infected. To prevent future infections there are a number of prudent measures that you can take to minimize your risk. First, never open unsolicited email attachments contained in received mail. This is one of the most used methods by hackers to infect targeted computers. Next, do not click links that you did not solicit. An increasingly popular method by hackers is to send malicious links out in spam email vice attachments since more users are becoming educated to the threat that email attachments play. If you have not purchased antivirus software and leave it running, you are long overdue. Additionally, ensuring that you run regular updates for your computer’s operating system, installed programs, and leaving the default firewall turned on is another must in today’s threat environment.