Download Avira Free Antivirus
Award-winning protection for Windows, Mac, Android, and iOS.
GET FREE ANTIVIRUS ON ALL YOUR DEVICES
Award-winning tech relied on by 500 million users and Fortune 500 companies.
Best product
Best protection
Top anti-ransomware protection
Best performance
Best usability
Free or Pro?
Your lifestyle. Your choice.
Avira Antivirus Pro
- Secures your shopping
- Blocks phishing attacks
- No ads & more
$44.99 / Year
The best antivirus
But don’t take our word for it — see our latest results from AV-Test
Best performance
We offer ultra-light virus definition updates – with a footprint so small it doesn’t slow you down and hog your system’s resources.
Security made in Germany
Avira is a member of IT Security Made in Germany—synonymous with quality and respect for your privacy. We don’t monitor what you do
nor share your private info with 3rd parties.
Our technology
To stay ahead, our multi-layered security harnesses the power of cloud technology, machine learning, and artificial intelligence. And as all the analysis happens on our end, you get top protection with minimal system impact.
We protect you from all online threats — for free
Ransomware
Ransomware
Ransomware
What is ransomware?
There are two types of ransomware: crypto-ransomware that encrypts files (rendering them unreadable), and screen-locking ransomware that locks the home screen. In both cases, the authors of malicious software demand a ransom from its victims to access the files and device.
Adware
Adware
Adware
What is adware?
Adware stands for “advertising software”, a program that displays banner ads and/or pop-ups on devices without permission.
Adware distinguishes itself from your typical in-product ads, in-app banners, and service-supported ads in the following ways:
• The software, which displays the ads, was installed without your explicit consent (often unnoticed during the installation process).
• The adware hijacks your web browser and redirects you to third party websites.
• Sensitive information related to your web browsing and purchasing habits is collected without your knowledge and consent.
Spyware
Spyware
Spyware
What is spyware?
Spyware is software that secretly monitors and collects information.
Spyware can be used legally. Certain companies install it on their employees’ computers to monitor sensitive activities (in which case, it ought to be included in their contracts). It is also included in some parental control programs, which can work in a similar fashion to keep a watchful eye out for cyberbullying.
Hacking
Hacking
Hacking
What is a hacker?
It denotes an individual with outstanding programming skills. Although frequently used to denote criminal activity, the term itself is agnostic.
Hackers are frequently divided into 3 categories: Black Hat, White Hat, and Grey Hat.
• Black Hat hackers are computer programmers who use their skill for illicit activities, such as developing malware.
• White Hat hackers, on the other hand, are frequently hired by companies with the explicit purpose of testing their network defenses.
• Grey Hat hackers are a more elusive community usually associated with hacktivism, a hacking activity driven by political or social motivations.
The prominent Anonymous group is often thought of as a community of Grey Hat hackers.
Phishing
Phishing
Phishing
What are phishing attacks?
These are attempts to capture sensitive information by cybercriminals masquerading as banks, social media platforms, and other official entities.
Rootkits
Rootkits
Rootkits
What are rootkits?
It’s a technique used by software to gain long-term access to a computer without having the required permission. Rootkits are typically installed by other malware to cover their traces. For example, a keylogger might siphon off passwords and credit card details, while the rootkit hides the traffic to keep the theft unbeknown to the user. Other cases involve Trojans that install a rootkit in order to create a botnet.
Trojans
Trojans
Trojans
What is a Trojan?
Trojans are malicious programs that misrepresent themselves to appear routine or helpful, but actually carry out hidden functions.
Worms
Worms
Worms
What is a computer worm?
Worms are malicious programs similar to viruses: they cause havoc on devices and are able to self-replicate. Unlike viruses, which need human action to propagate, worms are able to send out hundreds of thousands of copies of themselves via email, or spread via USB devices and shared folders.
Private by design: We don't sell your data.
Unlike most security vendors, Avira doesn't sell your data and never will. Nor do we share your data with 3rd parties such as government, Big Tech or advertising networks.
Made in Germany.
Downloaded by millions.
4.5/5 - Excellent
19,000+ reviews
And recommended by the industry
CNET Editor’s rating
Spectacular
Laptop, smartphone or tablet?
Secure all your devices with Avira
LOOKING FOR PREMIUM ANTIVIRUS?
Discover Antivirus Profor Mac and Windows
Learn more about the following
What is adware?
Adware shows annoying or infected advertisements on your device without your permission and you get spammed with banners and pop-ups…
Learn about adware
What is malware and how can I stay safe online?
Visiting websites and downloading files makes your computer or mobile device vulnerable to threats and attacks…
Learn about malware
What is ransomware and why do I need ransomware protection?
Ransomware is malicious software that encrypts the hard disk of the infected system…
Learn about ransomware
What is phishing and why can it lead to ID theft?
Is that email from your bank? This technique uses deceptive emails and websites to gather personal information…
Learn about phishing
What is spyware and why is it “watching”?
Spyware is a software that secretly monitors you and collects data about you, your device, and your online activities…
Learn about spyware