• Malwarebytes Free
  • ZoneAlarm
  • Windows 10 and Windows 11 include a very good and free antivirus program
    called “Windows Defender”, if your PC came with a trial or limited time copy
    of McAfee or Norton. Just uninstall it and Windows Defender will take over
    the antivirus protection for your computer.

Please be aware that some “free” antivirus software will contain a lot of advertising,
trying to up-sell you to a paid version or add more features at additional cost.