With Avira Free Antivirus, you can protect your data and devices from internet threats. Our next-gen antivirus helps you block ransomware, prevent phishing, and take proactive steps against viruses, Trojans, adware, and spyware. Thanks to our Protection Cloud technology, our real-time protection also safeguards you against zero-day attacks. On top of all this, the virus definitions are updated frequently and installed automatically in the background.