How antivirus works and why to update it regularly

We recommend you to install an antivirus on your windows system because most of the viruses are made for this OS platform. Download here


Antivirus software is a special type of utility software which prevents a system from being attacked by hackers, viruses, vulnerabilities, and from many other threats. There is number of antivirus available in the market now a days, selecting one of the best among them is difficult, so you may have a look on this post – “Top 5 antivirus of 2018” to make your choice for purchasing one. While using an antivirus basically a question arises that how an antivirus works or which functions does it perform in the background to remove threats or vulnerabilities present in a system. So today we are here with this post to make you clear what algorithms does an antivirus perform to detect vulnerabilities and threats in a system.

Algorithm for finding a threat


All antivirus have commonly similar technique for finding any type of virus that is comparing the file which is being scanned by antivirus with its virus definition or we can call it virus dictionary. An antivirus program have its own virus definitions which has a list and source code of most of the malware, spyware, adware, trojans and other harmful softwares. If any of the file infected with virus match with the records of the virus definitions the antivirus first try to repair it, if repairing gets failed it moves the file to sandbox or quarantine or may delete it. Sandbox is a virtual space within which harmful programs are moved by the antivirus to make the computer environment virus free. However Quick Heal Antivirus has a special feature that is DNA scan which can even predicts new viruses which are not in its virus definitions simply by tracing the suspicious behaviour of the program and source code of different files.

Algorithms performed in the background


An antivirus scans most of the files present in your drives for threats and other vulnerabilities, also before installing any software it scan all files of it and if the antivirus find any vulnerability in that software it may block its installation. It also scan files and programs when you extract a compressed or zip file. The antivirus also acts as firewall which makes your computer away from harmful attacks by hackers and other types of viruses. When you are online the antivirus blocks most the ads which are not relevent or which are spam, and also block sites which are found to be unsafe to enter any sensitive information like passwords, bank details and etc. It also check emails for harmful links and adware. An antivirus sometime removes files and programs to quarantine if it can’t repair it so that the file or program could not damage the PC and which can be later on be restored if needed by the user.

Necessity to update antivirus


Some people have a myth that there is no need for updating an antivirus and believe that it fund a bit to their server, but however it is not true and is highly recommended to update an antivirus at least twice or thrice a month as updating the antivirus updates the virus definitions which helps in detecting and treating new viruses. Also updating an antivirus aware you with the latest security updates. So we hope that you find this post very helpful to you. For any suggestions and queries you can leave a comment below. Please SUBSCR!BE to our newsletter below to get latest blog updates from us.

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3 Responses

  1. naresh says:

    Fantastic article

  2. Mukesh Patel says:

    Which antivirus is better? Avira vs McAfee.

    • We suggest you Quick Heal Total Security because its best among all of the antiviruses. However Avira is better than McAfee. Soon we are going to post an article on top 5 best antiviruses of 2018. Subscribe to our newsletter to stay tuned with us.

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