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<p>Though according to the anti-virus comparatives, kaspersky anti-virus rates highly amongst virus scanners in terms of detection rates, Kaspersky also have some advantages and disadvantages and those are:<br /> <p> <br> <p>Advantages :- The main advantages of Kaspersky Anti-Virus are its exceptional level of virus detection and high-speed scanning, easily distinguishing it from its competitors and garnering victory, offer a high level of virus detection and deletion, allowing each user to choose his/her appropriate anti-virus defence. Some other advantages of using Kaspersky anti-virus program is: the update always up-to-date, it has user friendly interface and good graphical view, proactive defence component is the main advantage of this program made to analyze the behaviour of installed program, to monitor changes in the system registry, tracking macros, and prevent from the hidden threats. Kaspersky not only protect your computer from viruses, but also from the network, like prevent adware, spywares, and prevent viruses spreading from e-mail attachments and so on.<br> <p> <br> <p>Disadvantages: - All programs have their disadvantages along with the positive points, so also the kaspersky. According to some users, installing the antivirus on the system reduces the speed of the system. Further, users of this antivirus say that the firewall compatibility and the anti spam components of this program needs to be improved. Though the antivirus is the best when it comes to virus detection, users say that this antivirus lacks in its ability to block unwanted content from websites and this feature needs to be added to ensure control over sites being accessed from a system.

Norton has traditional virus detection method like Signature base and Heuristics base detection, with anti-virus, anti-rootkit, anti-malware, anti-spyware etc. Symantec upgrade and releases new and more improved features with its every release. Signature based detection includes searching for knowing structure within executable code, however your computer can be infected with most new virus which signature is not known. In that case heuristics method can be use it can identify new viruses by variation of such code, in files. Malwares are very difficult to detect even for the most new anti-virus software. If you are using Norton Antivirus, you should update its data-base and virus definition every day, so that when you scan your computer, it can detect all possible threats. Some new features like SONAR, it examines the behaviour of applications to decide whether they are malicious. Various things are checked such as if the program create a desktop shortcut or create add/remove programs entry before determining the program is malicious.

Norton insight is a program that comes with the Norton 360. It improves the speed and quality of computer scan. It identifies well known files of client machine and excludes them from constant monitoring and scanning. It only scans unknown and unsecured files. Skipping the already known files helps the scan more impact.

Norton 360 introduced a very effective tool - Norton Power Eraser, it removes threats which standard anti-virus may miss. It cleans up system where malware prevents anti-virus installation. Apart from these, the key technologies of Norton anti-virus software are anti-virus, anti-spyware, anti-rootkit, and pulse-update - provides up-to-the-minute updates that protect against the latest threats without slowing down your computer, firewall software - that can use for mapping and monitoring network.

<p>First you have to install any one anti-virus software and make it ready with online update, and then scan your computer with that anti-virus software. Reliable anti-virus software features a scanner equipped with the technology required to detect and eradicate viruses, worms and other members of the malware family.<br /> <p> <br> <p>Viruses have many strategies to infect your computer, like avoiding detection from protection software. To prevent these virus strategies and protect your computer anti-virus software also has some methods, like Norton anti-virus use Signature base and Heuristics-base detection. Signature based detection includes searching for knowing structure within executable code, however your computer can be infected with most new virus which signature is not known. In that case heuristics method can be used. It can identify new viruses by variation of such code, in files.<br> <p> <br> <p>Norton anti-virus has many other features, which it upgrades from version to version, like Sonar protection. SONAR examines the behaviour of applications to decide whether they are malicious. Various things are checked such as if the program create a desktop shortcut or create add/remove programs entry before determining the program is malicious. Another feature is Norton insight. It is a program that comes with the Norton 360. It improves the speed and quality of computer scan. It identifies well known files of client machine and excludes them from constant monitoring and scanning. It only scans unknown and unsecured files. Skipping the already known files helps the scan more impact. Symantec antivirus can interaction with rogue software, actually these type of software are nothing but a misleading program, it always rebranded and cloned of its previous version.<br> <p> <br> <p>Many other anti-viruses have features like anti-virus, anti-malware, anti-spyware which is used to detect and remove viruses from your computer, whenever you scan your pc with this anti-virus software.

<p>Anti-virus software is a unique software program, which is used to prevent, detect and remove malicious programs, including but not limited to computer viruses, computer worm, Trojan Horses, Spyware and Adware.<br /> <p> <br /> <p>The primary method of preventing the propagation of malicious code involves the use of anti-virus software. Anti-virus software is an application that is installed on a system to protect it, and to scan for viruses as well as worms and Trojan horses. Most viruses have characteristics that are common to families of virus. Anti-virus software looks for these characteristics or fingerprints to identify and neutralize viruses before they impact you.<br /> <p> <br /> <p>There are many types of known viruses, and new ones are added all the time, so in this situation without anti-virus software your computer will be at great risk. There are different types of anti-virus software, some of them use basic technique to detect and remove viruses and malicious codes from your pc.<br /> <p> <br /> <p>On the other hand some anti-virus software uses its own unique features to protect your pc. Many known anti-virus software uses some very useful method, like Signature base detection and Heuristics base detection to detect viruses and malicious programs, and uses other methods and techniques according to their features. As new viruses added almost every day, anti-virus software companies also upgrade their anti-virus protection products, they launches their new version of antivirus software within very short period of time to provide users maximum protection from most recent threats.<br /> <p> <br /> <p>So if you are using any anti-virus software, it is recommended that you upgrade it and its virus definition regularly to be protected from viruses and malicious programs.