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Friday 9 September 2011

20.Update Antivirus Offline with Virus Definitions

"Update Antivirus Offline" is in great demand as people want to update their system with "Latest Virus Definitions" without having the online internet connection. As we all know that Antivirus is a must have software in your PC because it protects it from viruses, trojans, spywares, etc. Antivirus scans your PC for viruses and removes them as per user choice. There are many Antiviruses available in the market today, you can go for any antivirus which fits perfect for your PC. However, Most Antivirus have one unique Virus Definition which needs to be updated as the passage of time to protect ourselves from new virus. So to make Anti-virus detect latest viruses we need to Update Antivirus Offline or Online on behalf of Latest Virus Definations.

What are Antivirus Definitions: -



This is the most commonly employed method which involves searching for known patterns of virus within a given file. Every antivirus software will have a dictionary of sample malware codes called signatures in it’s database. Whenever a file is examined, the antivirus refers to the dictionary of sample codes present within it’s database and compares the same with the current file. If the piece of code within the file matches with the one in it’s dictionary then it is flagged and proper action is taken immediately so as to stop the virus from further replicating. The antivirus may choose to repair the file, quarantine or delete it permanently based on it’s potential risk.

As new viruses and malwares are created and released every day, this method of detection cannot defend against new malwares unless their samples are collected and signatures are released by the antivirus software company. Some companies may also encourage the users to upload new viruses or variants, so that the virus can be analyzed and the signature can be added to the dictionary.

Signature based detection can be very effective, but requires frequent updates of the virus signature dictionary. Hence the users must update their antivirus software on a regular basis so as to defend against new threats that are released daily(just like my ultra cautious friends).


Where to Download Antivirus Definitions: -

There are still many users who dont update their security softwares regularly due to the reason that they don’t have an internet connection. To protect your PC regularly you must update the antivirus regularly. So, You can update you antivirus manually by download update file from cyber cafĂ© or somewhere else(where you found internet connection). 

 
Antivirus Definitions can be downloaded from the Antivirus official website. But some antivirus do not provide this, so you have to use some other download sites to download antivirus definitions. SoftPedia has a large number of Antivirus Definitions, where almost all the antivirus definitions are available. Click below link to download Latest Antivirus Definitions for your PC.
·        Download Antivirus Definitions

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