Because Avira updates its detection files silently and automatically, most of our users never need install their own virus definition updates (VDF).
Performing an Avira manual update is only necessary under special circumstances, e.g., initiating an Avira VDF update without an internet connection.

Update Avira Antivirus

Performing an Avira manual update

Although automatic updating is the best way to stay protected, you can update Avira antivirus manually anytime. For Windows users, the easiest way is to right-click the Avira icon in the taskbar and select Start update.

You can also use our free Avira update tool to perform an Avira manual update. This utility creates an archive (fuse bundle) containing the latest engine, the Avira VDF update files and the corresponding Avira antivirus update control files (info.gz).

Virus signature information
The names of all viruses added to the each Avira VDF update file (IVDF) are available on the VDF History page.

Why use the Avira update free tool?

The Avira manual update tool, also known as the Fusebundle Generator, allows you to create an entire antivirus update archive incrementally. In other words, you no longer have to download an entire archive for each engine and signature update.

Download the Avira Update Tool

Looking for the latest Avira software version?

Head over to our download section, where you’ll find the most recent versions of our products. There you can not only download Avira antivirus update files for home and business, but also find management utilities, repair tools and complete product documentation.

Go to the Avira Download Center

To update Avira manually using the Fusebundle Generator, simply follow the steps outlined below.

Please see the how-to (PDF) for detailed information on configuring and using the Avira antivirus update tool.

  • The Avira update free tool (also known as the Fusebundle Generator) can be found here.
  • Decompress and open the avira_fusebundlegen-win32-en folder.
  • Double click on fusebundle.exe and wait for the fuse bundle archive (the Avira VDF update, engine and control files) to be generated. A new Install folder will also be created; this is where you can save
  • Open the Avira product, click Update from the top menu and select Manual Update.
  • In the popup window, navigate to the Install folder and open the archive.
  • All existing detection files will be replaced, even if they are newer than those in the generated archive. A progress bar will indicate the status of your Avira antivirus update.
  • Download the Avira update generator.
  • Unpack the Avira manual update application.
  • Run the Avira update generator.
  • Initiate the Avira antivirus update.
  • Load the Avira update archive (the fuse bundle).
  • Update Avira.
Performing Avira VDF updates on Unix

Before you update Avira manually using the Fusebundle Generator, please make sure that the old files are moved into a backup directory. If you don’t move the files and simply overwrite them with the new Avira update files, the product might behave strangely or even malfunction. Once the old files are set aside, unpack the archive and the restart or reload the product.