A manually triggered update immediately downloads and applies the latest security intelligence. This process might also address problems with automatic updates. Microsoft Defender Antivirus and other ...

Microsoft updates Windows Defender definitions for Windows 11 26H2 installation images, improving protection against malware ...

Windows 11 and macOS include solid built-in malware protection. Here's what Defender and XProtect cover, what paid suites add ...

Microsoft released a new Defender update for Windows 11,10, and Server installation images. It patches backdoors and more.

The majority of the updates that come through Windows Update are for Windows Defender, and for good reason. Windows Defender helps make your antimalware and other security protections stronger.

Best Antivirus Software Best Antivirus for Windows 11 PCs in 2026 Ranked Every Windows 11 PC comes with an antivirus already enabled. In fact, Microsoft Defender now scores well in independent lab ...

A patch Microsoft released on Wednesday to fix a zero-day vulnerability in its Defender security engine may cause Windows machines to write files large enough to completely consume available disk ...