Overview
Antivirus protection, also known as malware protection, is necessary to protect your device. While newer versions of Windows and MacOS come with built-in protection, it is important that you continue to update your operating system to ensure the latest protections are in place. Learn more about what malware protection you need below.
Windows
Windows versions 10 and up have a built-in anti-malware program called Microsoft Defender. If you are running a recent version of Windows, you are probably already protected. You should follow the instructions from Microsoft here to ensure that Defender is set up correctly and working as intended to protect you online.
If you are running a version older than Windows 10, you should upgrade your operating system to the most recent version of Windows, and keep it updated.
macOS
macOS also has a robust anti-malware toolset built in that is kept up-to-date by Apple through OS updates. If you are running a recent version of macOS (macOS Big Sur or newer: check here), then you are already protected against viruses and malware. Keep your Mac secure by configuring automatic updates!
Other operating systems
If you are running an older version of Windows or macOS, or if you are running a different operating system like Linux, then you need to install third-party anti-malware software. PCMag has a review of the best antivirus protection options available as of July 2023. Any product listed would be an acceptable choice, and several of them (Bitdefender, ESET, and Sophos at least) have Linux versions available. The most important thing is to install one of these products and apply updates to both your anti-malware software and your operating system as soon as they become available.