
In the latest test at the time of writing (December 2021), AV-Comparatives gave Microsoft Defender its highest three-star ranking for protection. Let’s look at the independent evidence from three different security software testers: AV-ComparativesĪV-Comparatives conducts regular tests of all the major Windows security software packages, including software from Kaspersky, McAfee and Norton. However, Windows Defender (as it is now known) competes very well with even paid-for security suites.

When Microsoft started bundling its own security software with Windows – it was called Microsoft Security Essentials in those days – it had a pretty ropey reputation.

Both versions of Windows build in Microsoft’s own security suite, Windows Defender, but is it good enough to rely on? First we’ll reveal how good Windows Defender is at stopping malware and then show you how to activate it on Windows 10 and Windows 11 if you decide to stick with it. If you run a Windows 10 or Windows 11 PC, you might well be wondering which antivirus software package to use on it.
