In this how to video, you will learn how to keep your Windows operating system secure by look for and closing open ports. First, you will need to run the program called Net State. Once this is open, type in netstat -a. This will list main connections. Next, type in netstat -an. This will give you the numbers of ports that are open. Some may be used for file sharing and anti-virus programs. If you want it completely secured, you should only have one running. This video shows you how easy it is to protect your operating system from hackers and malicious attacks.