Windows 10 has better security features than any of its predecessors — but it’s far from perfect.
While Microsoft’s Bitlocker feature is a really good device encryption tool, Windows Defender doesn’t rank as high in malware detection as most premium Windows 10 antivirus programs.
Plus, antivirus suites include other essential security protections that Windows doesn’t provide — encrypted VPNs, 2FA-enabled password managers, disk drive optimization tools, and high-performance parental controls. Windows Defender only scans for malware.
I use Norton 360 on my PC — it includes all of the above-mentioned features and a substantially better anti-malware engine than Windows Defender.