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Download free antivirus ready for Windows 11

Avira’s award-winning antivirus secures your Windows 11 device and protects you from online threats.

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Avira Free Security for Windows 11

Enhanced security, privacy, and performance - ready for your Windows 11 device




Protects you against all online threats, ransomware, and spyware.

Free VPN

Secures and anonymizes your online activities (browsing, chats, emails, etc.)*

Password Manager

Secures your online accounts with strong and unique passwords.

Browser tracking blocker

Prevents thousands of ad networks from tracking you across websites.

Anti-Scam protection

Helps you clean your PC, free up storage space, and eliminate junk files. 

Speed Booster

Improves your PC's performance and accelerates your system starts.

Software Updates

Helps you update your OS, apps and drivers for enhanced security and performance.

Privacy settings

Wipes your digital traces from apps and helps prevent Windows from tracking you.

* Our VPN offers 500 MB/month of free, encrypted web traffic
screenshot of Avira Free Security smart scan running

Real-time antivirus protection

Protects you in real time against all types of malware and viruses. With an ever-growing database and more than 10k new virus strains added daily, Avira Free Security protects you against emerging threats and latest malware.

Avira Protection Cloud

Avira’s cloud-based technology provides industry-leading detection rates and enhanced protection against the most sophisticated threats, including ransomware, banking Trojans, and newly developed viruses.

More than just an antivirus

Avira Free Security includes a free VPN for secure and anonymous browsing, a password manager for securing your online accounts, driver and software updater, and much more. Explore all the features of Avira Free Security for Windows 11.

Award-winning tech relied on by 500 million users and Fortune 500 companies.

Security features in Windows 11


With Windows 11, Microsoft is focusing on security in response to the rapidly evolving cyberthreats. Windows 11 requires newer CPUs and motherboards that can support advanced security features such as virtualization-based security (VBS), memory integrity or hypervisor-protected code integrity (HVCI), and Secure Boot. These features are turned on by default to increase protection against malware.

Virtualization-based security (VBS) is used to create and isolate a region of memory from the rest of the operating system so that processes can run in a secure and controlled environment, called “virtual secure mode.” Even if the system gets infected with malware, the malware can be contained, and its damaging effects reduced.

Hypervisor-protected code integrity (HVCI), better known as memory integrity, is a virtualization feature that verifies the integrity of the code running in the Windows kernel. It prevents malicious code from running and helps users protect themselves from exploits.

Secure Boot, Trusted Boot, and Measured Boot prevent unauthorized software from running by checking the software loaded during the boot sequence. These features are crucial for preventing rootkits, a type of malware that typically loads at startup, bypassing operating system security.

Windows Defender vs. Avira Free Security


In addition to the hardware-based security features, the latest Windows release comes with Windows Defender built-in, offering basic malware protection. However, with new malware being developed each day, relying on the built-in security features is not enough to keep your device and data secure.

Specialized antivirus solutions have better Malware Scanners and are updated more frequently. With less frequent updates, Windows Defender might miss some of the latest viruses. With specialized antivirus software, such as Avira Free Security for Windows, you have an additional layer of protection against malware and viruses. Plus, you get a lot of extra features in addition to the antivirus:

  • Free VPN (with up to 1GB of data per month) for safe and anonymous browsing 

  • Password Manager for generating and storing unbreakable passwords for all your accounts 


“Avira’s cloud-based Malware Scanner performed really well during my tests, detecting 100% of the malware sample files on my device — far better than Windows Defender.” (SafetyDetectives)




Installing an antivirus in addition to Windows Defender is highly recommended. Specialized antivirus solutions, such as Avira Free Security, have more powerful virus scan engines, larger malware databases, and receive updates more frequently compared to Windows Defender. Windows Defender is a good solution for basic protection against viruses, but the rapidly evolving cyberthreat landscape makes it necessary to have an additional layer of protection.

Avira Free Security for Windows is a powerful antivirus packed with extra features such as a free VPN, password manager, software and driver updater, and more. It has been ranked the best free Windows antivirus by SafetyDetectives and it has received multiple awards for its protection capabilities, usability, and performance. Avira’s cloud-based Malware Scanner provides reliable real-time detection, achieving 99.99% detection rates, and its efficient use of resources does not slow down your PC.

To upgrade to Windows 11, your Windows device needs:  

  • CPU: x86_64 or ARM64 CPU with at least two cores and 1 GHz 

  • RAM: minimum 4GB of RAM 

  • Storage: minimum 64GB, preferably at least 128GB 

  • Graphics: compatible with DX12 or later, with WDDM 2.0 driver 

  • Firmware: UEFI, Secure Boot capable 

  • TPM: Trusted Platform Module 2.0 

  • Display: 720p minimum resolution, 8 bits per color channel or higher

Download Avira Free Security from our website. Open the .exe file and follow the installation instructions. In just a few minutes, you will be able to run your first smart scan to check for security, privacy, and performance issues. We recommend that you create a My Avira Account to benefit from additional VPN dataextra features for Password Manager, and more.

Windows Defender does not conflict with other antivirus software. However, to ensure your system’s performance is not affected by running multiple security programs, you should enable real-time protection only for one of them. You can temporarily disable the real-time protection in Windows Defender in the Virus & Threat Protection Settings of Windows Security if you have another antivirus software installed.

System Requirements
Important: Your current Windows version is outdated and no longer supported.
For your security, we recommend switching to Windows 10 before downloading Avira software.
Update your Windows version here.
Wichtig: Ihre Windows-Version ist veraltet und wird nicht mehr unterstützt.
Zu Ihrer Sicherheit empfehlen wir Ihnen den Wechsel zu Windows 10 vor dem Download unserer Software.
Hier können Sie Ihr Windows aktualisieren.
Important: Votre version actuelle de Windows est obsolète et n’est plus prise en charge.
Pour votre sécurité, nous vous conseillons de passer à Windows 10 avant de télécharger le logiciel Avira.
Mettez à jour votre version de Windows ici.
Importante: Tu versión actual de Windows está desactualizada y ya no es compatible.
Por tu seguridad, te recomendamos que instales Windows 10 antes de descargar la solución de Avira.
Actualiza aquí tu versión de Windows.
Importante: La tua attuale versione di Windows è obsoleta e non è più supportata.
Per la tua sicurezza, ti consigliamo di passare a Windows 10 prima di scaricare i software Avira.
Aggiorna la tua versione di Windows qui.
Importante: Sua versão atual do Windows está desatualizada e não tem mais suporte.
Para sua segurança, recomendamos que troque para o Windows 10 antes de baixar o software da Avira.
Atualize sua versão do Windows aqui.
Важно: ваша версия Windows устарела и больше не поддерживается.
Из соображений безопасности перед загрузкой ПО Avira мы рекомендуем перейти на Windows 10.
Обновить Windows вы можете здесь.
Belangrijk: Uw huidige versie van Windows is verouderd en wordt niet meer ondersteund.
Voor uw veiligheid adviseren wij u om over te stappen op Windows 10 voordat u de Avira-software downloadt.
Update uw Windows-versie hier.
Önemli: Kullanmakta olduğunuz Windows sürümü eski ve artık desteklenmiyor.
Güvenliğiniz için Avira yazılımını indirmeden önce Windows 10 sürümüne yükseltmenizi öneririz.
Windows sürümünü buradan güncelleyin.
重要 : 現在お使いの Windows バージョンは古いため、サポートされなくなりました。
安全のため、Avira ソフトウェアをダウンロードする前に Windows 10 に切り替えることをお勧めします。
こちらより Windows バージョンをアップデートしてください
重要信息 : 您当前的 Windows 版本已过时,并且不再受支持。
为了安全起见,我们建议您在下载 Avira 软件之前切换到 Windows 10。
在此升级您的 Windows 版本
重要資訊 : 您當前的 Windows 版本已過時,並且不再受支援。
為了安全起見,我們建議您在下載 Avira 軟體之前切換到 Windows 10。
在此升級您的 Windows 版本