Bitdefender’s free antivirus software has the same core features as its paid plans. It protects your Windows PC from malware, blocks zero-day attacks, and even includes ransomware protection.

On Windows 11, the Microsoft Defender Antivirus provides real-time protection ... a specific file or folder manually to ensure they're free of viruses or anything harmful to your computer.

But this free protection comes preinstalled on Windows machines and does ... absolutely yes—which is why Windows 10 and 11 come with in built-in antivirus protection. But while Windows Security ...

You don't have to pay extra, though. We’ve tested and ranked the best free antivirus apps. When the IBM PC was new, I served as the president of the San Francisco PC User Group for three years.