Recently, a computer security expert said that the only way to keep a computer at 100% was safe, not turn on. It turns out that a little 'inaccurate and misleading. A computer that will print only the type of documents and not connected to the Internet, and that is never the files to another computer, transmitted, may actually be a useful tool in computer system 100% secure. This leads us to two main ways to get viruses and other malware on a computer: over a network like the Internet and transfer files from other computers. Users want to connect multiple computers to the Internet and e-mail, instant messages, browse Web pages, download music and games software, etc. The problem is that not only millions but billions of people on their feet! Imagine that, if directly reach billions of people in a house that could – how many patients will come to see if the doors and windows were secured? Like many deceivers would knock on the door? An Internet-connected computer is right that in a predicament. When a computer starts with a network of design, listen to wire communications from the outside world. The things you notice as a door, he created the special "doors" on your computer. These ports are something special, because you have a specific program that knocked on the door when it is switched on, an answer. Examples of programs that are listening to the traffic on the network: 1 Instant Messaging programs2. Internet Phone software3. Software to connect to the remote computer locations4. Internet games, including the operating system itself opens its doors to share files or printers or other computer. Each of these programs is a "door" on a computer, they need to respond when someone knocks on. If the program is bad, then develops when the answers of the "tapping" program can take advantage and thereby affect the computer. Besides the people went on the Internet and tap one of the "gates" above – including using a web browser and navigation of Internet users to invite people to access their computer. Each time you scan a Web page, the browser and download the files on your computer and processing. If the Web browser is not programmed correctly, is a security risk. For example, December 12, 2008 Microsoft has reported a big security hole in all versions of Internet Explorer. The hole allows data theft software on the victim's computer is only infected by a Web page will be installed! Invite more examples of programs that provide access to a computer: ? E-Mail Programs ? File sharing and music sharing programs (by far one of the greatest risks to security) ? instant messaging software hence as a computers in isolation from the outside world How can you protect a computer system? Here are some tips: 1 Do not use Internet Explorer as your primary browser. I'm not bashing or Microsoft Internet Explorer, and especially what should be clear: it is not necessarily that other browsers are programmed so much better, but 80% of people surf the Internet with Internet Explorer. In this way the thieves access to the maximum of the victims were interested in going, most of their efforts to exploit security vulnerabilities in the browser you use to spend 80% of men. 2. Put a firewall between your internal network and the Internet. A firewall is responsible for billions of people who are currently on hand. It will only admit that invite you to knock on the door of the computer. 3. Use a firewall on each computer. The network firewall above is a big step towards protecting the internal network. The problem is that generally does not protect users from themselves. A user browsing a Web site indicates the network firewall that has granted an invitation to this site and will restore files from this website through. When the infected user to a Web page using a browser that has a vulnerability to a virus entering the network. If there is a certain type of virus, we could begin to replicate inside the local network. A firewall protects your computer against this type of problem. 4. Update your operating system and browser. Vulnerabilities are always found on all operating systems and browsers. Software updates, patches these holes. 5. Use a good and up-to-date antivirus and antispyware program. These programs help prevent damage caused by viruses that do it on your system. 6. Backup data. Short isolate a computer, it is impossible to ensure 100% is a system. If you must back up your data to prevent a disaster, most with good backup. The above is the basics and do much to protect computer systems.  Read more...