Windows Defender provided by Win8 is sufficient, so you do not need to consider third-party security software.

Before the official version of Win8 was released, many anti-virus software products were not compatible with Win8, and some could not be installed. Many users worried about the security of their computers-of course, these concerns were unnecessary, as I introduced in the previous article, Win8 comes with a good Windows Defender.

The first is the Windows Defender interface. The interface inherited from MSE is not as simple as the Bitdefender free version, so it makes users feel at a loss, and is not too complicated and dazzling, it provides a simple and clear user experience.

The second is Windows Defender's real-time protection, and avast! Like Bitdefender, Windows Defender prompts you that malicious software has been detected while extracting the sample package. In addition, it not only deletes or isolates detected virus files, instead, it repairs a part of files that can be repaired. At the same time, I believe that Windows Defender is the most familiar one, so the false positive rate of Defender is also very low, so that you can safely give it the responsibility of system security protection.
Finally, let's take a look at the resource usage of Windows Defender during full scan. The memory usage is only about 60 MB, which is definitely an efficient anti-virus software.

Vi. Firewall:

After talking about free anti-virus software for half a day, how can I forget the firewall. Because of the positioning of free anti-virus software, the vast majority of free anti-virus software does not have the firewall function, but in fact you do not have to worry about it, because Windows systems have always come with firewalls, it remains in your control panel and silently protects your system. As one of the important security components of Win8, the system's built-in fire wall features great performance and won't lose to some paid firewall software.

In fact, there are still many excellent free kill software compatible with Win8. This article just selects several outstanding ones to give you a brief introduction. To judge the level of a soft killer, we need to judge from many factors, which of the following is the best. However, these anti-virus software can represent the highest level of free software kill in the world today. You may choose one of them to try it out, and I believe it will not disappoint you.

In particular, Windows Defender, which comes with Win8, works with the system firewall and UAC (User Account Control) to build a solid and secure Great Wall for your system.