Is Windows (Microsoft) Defender Good Enough?  KB ID 0001940 Problem A common question that still comes up surprisingly often is: “Is Windows Defender good enough, or do I still need a third‑party antivirus?” For years, the default advice for any fresh Windows installation was “install a proper antivirus immediately”. That advice used to be absolutely correct. However, Windows security has changed significantly over the last decade, and the old wisdom is no longer automatically true. This article looks at what Microsoft Defender actually provides today, how it performs in independent testing, where its...