Avast Antivirus
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Avira Free Security is a free antivirus for Windows from Avira Operations GmbH. Version 1.0.49.727 installs from a small online setup file.
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· 6.5 MB
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About Avira Free Security
Avira Free Security 1.0.49.727 is a free antivirus for Windows from Avira Operations GmbH, updated on 26 September 2026. According to catalogue data, the setup file is about 6.52 MB and fetches the rest of the program during installation.
Check the system requirements first: the installed product needs far more disk space than the setup file suggests.
System requirements
| Windows | Windows 11/10 (all versions), Windows 8/8.1, Windows 7 SP1 with SHA2 support |
|---|---|
| ARM | Windows 11 on ARM, including Snapdragon X (Plus and Elite) |
| Processor | 1 GHz |
| Memory | 2 GB on Windows 11/10; 1 GB (32-bit) or 2 GB (64-bit) on Windows 8/7 |
| Disk space | 1.8 GB free |
| Browsers for the extension | Google Chrome, Mozilla Firefox |
Windows 11 and 10 in S Mode are not supported. Avira keeps the full list on its system requirements page.
What you get
Avira is one of the oldest names in PC security: the company behind it dates back to 1986, and its antivirus program is still the core of the package. Free Security wraps that scanner in a single dashboard where you run scans, check the protection status and see what the program has blocked. Protection runs in the background, and you can start a quick or full scan whenever you want. Avira also supports Chrome and Firefox, which is why both browsers appear in its requirements. The free edition works on its own without a time limit. For many home users that is enough, especially on a PC where Microsoft Defender has been switched off or replaced.
How to install it
- Download the setup file from Avira's Free Security page.
- Run it and accept the license terms.
- Wait while the installer downloads the full program and current virus definitions.
- Run a first full scan once the dashboard opens.
Is Avira safe and really free?
Yes, as long as you download it from avira.com. The free edition is not a trial. You may see offers for paid Avira products; you can ignore them and keep using the free protection.
Who should choose it
Avira Free Security makes sense on a family PC, on an older laptop that still runs Windows 7 or 8, or on a machine where you want a second opinion next to the protection Windows already has. It is less suitable for very small SSDs, because the installed program needs 1.8 GB. If the computer runs Windows in S Mode, it cannot be installed at all. Business users should look at Avira's paid products instead, since the free edition is meant for home use.
Version history
Avira publishes the build numbers of its products on the Current Avira versions page, which is the easiest place to confirm that you run the latest release.
Pros and cons
- Free antivirus with no time limit.
- Small setup file, runs on old and new Windows versions.
- Takes far more disk space than the small setup file suggests.
- Upgrade prompts for paid products.
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