Avast Virus Definitions

Version: 20.9.58   Filesize: 0.2MB

  • Freeware
  • In English
  • Scanned
  • 3.8
  • (5.42 K Downloads)

Looking for a way to upgrade virus definition files on your Computer System? Annoyed by other antivirus software which does not work properly? Well, then look no further than Avast Virus, as it is the perfect software for you to use.

What is Avast Virus Definitions?
Avast Virus definition is a free to use tool that has been developed and published by the Company Avast. Avast Virus Definitions is essentially a support tool for the Avast antivirus tool. Avast is one of the best providers of antivirus software on the market, with almost all of their products being top notch. Avast antivirus software quickly scans your device, find out, and removes any sort of viruses, Spyware, or any other harmful files. Avast antivirus is very consistent and reliable and is one of the most popular antivirus software available on the internet. Avast also has different antivirus scans for you to run, allowing you to control how you want to scan your computer. Now for any antivirus software to work properly, virus definitions are a must. Without them, antivirus will not be able to detect and remove viruses quickly and efficiently. Now usually Avast antivirus software have their own virus definition lists, and these lists automatically get updated when your computer system is connected to the internet. However, if you are unable to connect to the internet and you need to scan a file and are worried that your Avast antivirus definition lists are not updated, this can be a serious problem. This is where Avast Virus Definitions comes in, as it updates the virus definition list for any of your Avast products without needing to be connected to the internet, which is very convenient and helpful.

What are Virus Definitions?
Virus Definitions (Also known as Virus Signatures) are essential to the functioning of any antivirus software as it is the mechanism by which the computer recognizes viruses. This list of virus definitions needs to stay up to date to keep track of all the viruses. When you run a scan on an antivirus, it checks the different Virus definition files, and if any file on your computer matches the virus definition, then a virus has been found.

How to use Avast Virus Definitions?
As Avast Virus Definitions is simply an update tool for Avast antivirus software, the user interface is the same as the Avast antivirus interface. The Avast User Interface has 4 different tabs – Status, Privacy, Performance, and Performance. On the bottom-left corner is the Avast settings button from where you can update the virus definition list.

How to get Avast Virus Definitions?
You can get Avast Virus Definitions by following the steps given below –

  • 1. Click on the download button to start installing Avast Virus Definitions.
  • 2. Download and open the Avast Virus Definitions installer.
  • 3. Read the Avast Virus Definitions ToS (Terms of Service) and agree to it.
  • 4. Read the Avast Virus Definitions License agreement and click on agree.
  • 5. Select the destination folder for Avast Virus Definitions and wait for it to install.
  • 6. You can now use Avast Virus Definitions anytime you want.


  • Updates your Virus definition list.


  • No use for it if you are online.

App Name: Avast Virus Definitions

License: Freeware

OS: Windows XP / Vista / Windows 7 / Windows 8 / Windows 10

Latest Version: V20.9.58

Latest Update: 2020-12-23

Developer: AVAST Software

User Rating: 3.8

Category: Anti-Virus

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