How to use Microsoft Defender, the antivirus security program on Windows 10

Formerly known as Windows Defender, Microsoft Defender is an antivirus protection program that's included with Windows 10.
Neowin

ICYMI: Microsoft released new Windows 11/10 Defender update for installations0 0

Microsoft published a new Defender update when it released its October 2024 Patch Tuesday (it did not release any in November.) This update package is necessary as a Windows installation image may ...
Neowin

Microsoft cautions new Windows 11 / 10 ISO installs must have this Defender update0 0

This past week Microsoft released the Patch Tuesday updates for August 2025 on Windows 10 (KB5063709 / KB5063877 / KB5063871 / KB5063889) and for Windows 11 (KB5063878, KB5063875). Aside from that, ...
Liliputing

Microsoft Office and Defender will support Windows 10 through at least 2028 (even though Windows 10 support ends this year)

Microsoft is ending Windows 10 support for most users on October 14, 2025 and the company has been urging users to upgrade to Windows 11. But in what seems to be a tacit acknowledgment that a lot of ...
CSOonline

A spoof antivirus makes Windows Defender disable security scans

In a proof-of-concept, a security researcher demonstrated how the Windows Security Center API can be used to block the scans by Microsoft’s built-in antivirus tool. Windows Defender can be tricked ...
Bleeping Computer

Windows 10 KB5040525 fixes WDAC issues causing app failures, memory leak

Microsoft has released the July 2024 preview update for Windows 10, version 22H2, with fixes for Windows Defender Application Control (WDAC) issues causing app crashes and system memory exhaustion.