Download Windows Antivirus For Free - Avira

Important: Your current Windows version is outdated and no longer supported. For your security, we recommend switching to Windows 10 or Windows 11 before downloading Avira software. Update your Windows version here. Our Avira Phantom VPN is no longer available for use within India as a result of governmental regulations requiring the logging and saving of user data, but you can still use your subscription when traveling outside of India.

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Avira Free Antivirus for Windows

Award-winning protection, and free forever

• Top antivirus: blocks spyware, adware, ransomware, etc.
• Real-time protection & updates
• Light and fast: doesn’t slow down your PC

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Editors' rating:

Rating: 5 stars

Spectacular

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GET FREE ANTIVIRUS ON ALL YOUR DEVICES

• Free Antivirus for Mac >

• Free Antivirus for Android >

• Free Mobile Security for iOS >

Award-winning technology that helps protect millions of users.

Best Usability

Anti-Phishing

Malware Protection

Real-World Protection

Performance

• Scan & repair
• Up-to-date
• Light
• Why Avira?

Real-time protection & repair

We protect you from billions of malware attacks annually, including against ransomware, Trojans, worms, viruses, and more. In addition to virus scans, our antivirus software includes advanced repair functionalities, fixing over 90 million files last year.

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Real-time updates via the cloud

Stronger together: every secured device is as a sensor, which detects emerging, never-seen-before attacks. As soon as a new threat is identified, all our customers are immediately immunized against it, protecting millions within minutes.

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Light and fast

Avira has one of the smallest footprints in the industry – with virus definition updates 2-5 lighter than most other antivirus products. Unlike many others, our protection doesn’t slow you down nor hog your system’s resources.

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The best antivirus protection

With over 30 years of security experience, Avira offers superior detection, with additional web protection and repair capabilities. And as a German company, we don’t track what you do or sell your data to third parties.

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Avira has more than 35 years of online security experience

Trustpilot

From our best comments

Rating: 5 stars

“Avira Free Security is the latest evolution of the modern antivirus solution. In its basic form, it brings forth one of the best antivirus engines, a VPN, and a lot of other efficient goodies that will have a big impact on protecting your privacy and even ensure that your computer is running as it should.”

softpedia.com

There’s safety in numbers

100 million+

internet-attached devices make up our world-wide sensor network

8.4 million

attacks a day are blocked on average

97.5 million

phishing attacks were stopped in the last 12 months alone

17 million

ransomware attempts were thwarted in the last year

What’s inside? The latest technologies

Antivirus Scanner

Detects and blocks malware (viruses, ransomware, banker trojans, etc.)

NightVision

Our automated, intelligent learning system protects you against new and evolving threats.

PUA Shield

Identifies potentially unwanted applications hidden within legitimate software.

Safe Browsing

Blocks harmful websites before they load.

Ad Blocker

Prevents intrusive and malicious ads, banners, and pop-ups from loading.

Browser Tracking Blocker

Stops companies from monitoring you online.

Price Comparison

Saves you money while you shop.

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Unlock premium features with Avira Antivirus Pro

• Scans downloads, torrents & cloud storage
• Scans email attachments
• Scans USB devices
• No Ads
• Unlimited Customer Support

Discover Pro

Laptop, smartphone or tablet?

Secure all your devices with Avira

• Free Antivirus for Windows

• Free Antivirus for Mac

• Free Antivirus for Android

• Free Mobile Security for iOS

LOOKING FOR PREMIUM ANTIVIRUS?

Discover Antivirus Profor Mac and Windows

Install Avira Free Antivirus for Windows in 3 easy steps

1. Run the installer

   Double-click on the downloaded file

2. Confirm

   Click "Yes" on the dialog box to start your installation

3. Follow the on-screen instructions

   This should take a few minutes only

What’s inside Avira Free Antivirus for Windows?

All the essentials to ensure your security, privacy, and performance.

• Security

• Online privacy

• Optimization

All the security essentials

Whatever you use and whatever you do, keep it secure

Avira Free Antivirus for Windows protects your personal data, your software, your browsing, your searches, and even your home network.

Antivirus protection

Protects you in real time against malware and online threats.

Software Updates

Keeps your software and drivers up to date.

Browser Safety

Blocks infected websites, browser trackers, and intrusive ads.

Safe Shopping

Finds secure, money-saving deals and coupons when you’re shopping.

All the privacy essentials

Be anonymous in everything you do

Avira Free Antivirus for Windows helps you browse anonymously, encrypts your web traffic, prevents companies from collecting your private data, and keeps your passwords secure and for your eyes only.

Free VPN

Encrypts and anonymizes your web traffic (500 MB/month)

Privacy settings optimisation

Optimizes over 200 privacy settings with just a few clicks

Password Management

Creates & remembers unhackable passwords for each account

Get peak performance

Your PC running as it should

You deserve the best digital experience. Get greater speed and more memory from all your devices. All with just one click.

PC tune-up tools

Cleans junk files, speeds up your boot time, and reduces lags.

System Requirements

Your device is compatibleYour device is not compatibleRead full specifications

Download the award-winning free antivirus for Windows

Download for free

Avira Free Antivirus for Windows: Free antivirus protection for your PC

Why do you need antivirus protection for your Windows PC?

Cybercriminals are always developing new ways and becoming more and more sophisticated at obtaining your sensitive data or injecting malware onto your computer. Despite the name antivirus protection, viruses are far from the only online danger. Whether it’s blackmailing ransomware that’s holding your data hostage, spyware that’s monitoring everything you do, or a Trojan that’s hidden malware on your system — malware has many faces and is spread in different ways. There are many dangers lurking around the corner, especially when surfing the internet — such as when using unsecured public Wi-Fi hotspots, which are often used to launch cyberattacks, or phishing websites that target your online account log-in details.

This makes it a good idea to arm your Windows PC with an antivirus protection solution with enhanced levels of protection. A good antivirus program monitors your PC in real time and helps you regularly scan your computer for malware and protect it from online threats. That’s why our advanced AI technology with cloud-based threat detection provides you with dependable real-time protection and thorough virus scanning. And to ensure your PC protection is always up to date, virus definitions are updated automatically.

Avira Free Antivirus for Windows also includes additional cyberprotection tools such as a browser safety extension with phishing protection to block unsafe and dangerous websites, plus a software updater to keep your programs up to date and protected from attacks on recently discovered software vulnerabilities.

Avira Free Antivirus for Windows: Antivirus protection for your PC that you can count on — and costs nothing

Our antivirus program for Windows 10 and Windows 11 uses the latest cloud security technology to quickly detect even the latest online threats. Avira Free Antivirus system protection is always active, monitoring your PC automatically. Every file that’s used, copied, or accessed is scanned in real time and blocked if a threat is detected.

Files are scanned and detected in the Avira Protection Cloud, which has a powerful scan engine and uses our self-learning AI system NightVisionTM. If a suspicious file is discovered, this file’s digital fingerprint is analyzed and compared with the virus database. Each digital fingerprint uploaded to the cloud expands the continuously growing database, improving virus detection capabilities. This means ransomware can also be detected and blocked quickly and reliably.

Avira Antivirus Pro goes one step further still, offering even stronger ransomware protection. The advanced antivirus protection for Windows 10 and Windows 11 not only performs a signature-based but also a behavior-based analysis, detecting even previously unknown mutations. In addition, your files are prioritized so they’re scanned even faster. In addition, Avira Antivirus Pro for Windows also features integrated web protection as well as email protection to scan your emails for phishing links and malicious attachments, plus the Avira Firewall.

How to turn on Avira’s Windows antivirus protection

Click the download button to save Avira Free Antivirus, open the downloaded file, and follow the installation instructions. Once installed, system protection runs automatically in the background, but can be turned off temporarily if you want.

You’ll need to start the virus scanner manually, which runs in the foreground. You can run a quick scan to check the most vulnerable areas of your device or have your entire system checked with a full scan. You can also run preset or custom scans, and schedule and manage your scans.

The convenient Smart Scan feature allows you to check your device for cybersecurity, online privacy, and performance issues with just a single click. This is all thanks to our free Windows protection solution offering much more than just an antivirus program.

Avira Free Antivirus for Windows: Free antivirus protection for your PC — and more besides

With our free antivirus solution for Windows 10 and Windows 11, you can not only protect yourself and your device from malware such as viruses but also get many other tools to boost your cybersecurity, online privacy, and device performance.

VPN: The VPN helps you encrypt your online traffic and surf anonymously, So you can surf more safely even on unsecured Wi-Fi networks.

Software updater: The software updater helps you keep your programs and drivers up to date and close security holes in outdated software.

Browser safety extension: The Avira Browser Safety extension helps you block unsafe and phishing websites, malicious downloads, as well as ads and online tracking.

Password manager: The password manager helps you generate super-strong and unique passwords for your various online accounts and store them more securely.

Tuning tools: The tune-up utilities help you clean up and put the zip back into your devices and optimize the start time of your Windows PC.

Is Avira Free Antivirus really free?

Yes: Avira Free Antivirus for Windows 10 and Windows 11 is available to download for nothing. The antivirus protection program for your PC uses the same scan engine as Avira Antivirus Pro for online protection you can count on. The Pro version for Windows has additional features such as integrated web protection, email protection to block malicious attachments and phishing links, advanced ransomware protection, and the Avira Firewall.

On which devices can I install Avira Free Antivirus?

Our PC antivirus protection solution Avira Free Antivirus is available as a free download for all computers running Windows 7, 10, or 11. We also offer free online protection solutions for your mobile devices in the form of Avira Antivirus Security for Android and Avira Mobile Security for iOS.

Is additional antivirus protection necessary for Windows 11 or is Microsoft Defender good enough?

Windows 11 offers basic antivirus protection with the pre-installed Windows Defender app — although unlike Avira Free Antivirus for Windows, it does not have additional cyberprotection levels and online privacy features. These include a VPN, a password manager, a browser safety extension with phishing protection, and a software updater that also updates third-party PC programs. That’s why we recommend using our free antivirus protection solution Avira Free Antivirus on your Windows 11 computer to boost your online security.

Although Windows Defender doesn’t conflict with other antivirus programs, it’s best to only have one antivirus program running at any one time so multiple security apps running simultaneously don’t impact on your device’s performance. If you’ve installed other antivirus software, you can disable Windows Defender’s real-time protection temporarily in the virus & threat protection settings in the Windows Security app.

What’s the difference between Avira Free Antivirus and Avira Free Security?

In short, there is none. When we added additional tools and features such as the VPN, the software updater, the optimization tools, and the password manager to our standalone Avira Free Antivirus solution, we renamed this all-in-one solution Avira Free Security. So that even those users who don’t know this and who are searching for Avira Free Antivirus can find what they’re looking for, we still offer Avira Free Security under the name Avira Free Antivirus.

Renewal prices for certain annual plans will increase effective July 17, 2024. Review the new pricing here: loading... for Avira Prime - 5 devices, loading... for Avira Prime - 25 devices, loading... for Avira Antivirus Pro, loading... for Avira System Speedup, loading... for Avira Optimization Suite, loading... for Avira Internet Security.

*Important Subscription, Pricing and Offer Details

• Contract Type: contract for a monthly or annual subscription, starting when the transaction is complete. Click here for our Terms of Sale.
• Set-up: to get the protection/service started, you must download and install on each device and/or complete set-up.
• Free Trial: payment method required if signing up for a free trial (credit/debit card or PayPal only). When the trial ends, the paid subscription starts and the first term is charged, unless cancelled before. Special offer(s) may expire.
• Renewal Cycle: automatically renews each month or each year after the initial term, unless the subscription renewal is cancelled before the day you are due to be charged in your account or by contacting us. Click here to learn how.
• Renewal Prices: may be higher than the price for the initial term and are subject to change. They are charged up to 35 days before the annual subscription is due to renew, and we send you a notification email with the renewal price before. They are charged up to 5 days before the monthly subscription is due to renew.
• Cancellation & Refund: you can cancel your contract and request a full refund within 60 days of purchase for annual subscriptions and within 14 days of purchase for monthly subscriptions. For each annual renewal or free trial with paid annual subscription, you can request a full refund within 60 days of being charged, and after the 60 days, a pro-rated refund of the days left in your renewed subscription term, beginning the month after you request the refund. For free trial with paid monthly subscription, you can request a full refund within 14 days of being charged. For details, visit our Cancellation & Refund Policy. To cancel your contract or request a refund, click hereclick here.
• Updates: your subscription may include product, service and/or protection updates, and features that may be added, modified, or removed, subject to the acceptance of the License & Services Agreement.
• Usage: for non-commercial household use only. If you have issues adding a device, please contact us.

• Awards
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• Features
• Cross-platform
• Installation
• Benefits
• System requirements

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When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. Special offer for the 1st #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. Special offer for the first #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period# and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. Special offer for the 1st #cma_period# until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period# and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / first #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. Special offer until #cma_promo_end_date#. When trial ends: paid subscription starts at #cma_promo_price# / 1st #cma_period#, and automatically renews at #cma_promo_renewal_price# / #cma_renewal_period#, unless the renewal is cancelled. Offer details below.* Payment method required. When trial ends: paid subscription starts and automatically renews, unless the renewal is cancelled. Price subject to change. Offer details below.* #cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Then #cma_promo_renewal_price# / #cma_renewal_period#. #cma_promo_price# — #cma_promo_saved_price# off the first 2 year price of #cma_promo_standard_price#. Then #cma_promo_renewal_price# / #cma_renewal_period#. #cma_promo_price# — #cma_promo_saved_price# off the 1st #cma_period# price of #cma_promo_standard_price#. Then #cma_promo_renewal_price# / #cma_renewal_period#. The remaining value left on your current subscription is converted into additional days in your new subscription. Big savings. Strong online security: 45% off Avira Prime > Riesen Rabatt. Starke Online-Sicherheit: 45% auf Avira Prime >