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.

Microsoft has resolved a known issue that causes incorrect alerts warning that Defender Antivirus was turned off after installing recent updates.

Having Windows installation images is handy; they can be used to reinstall your operating system, but they are also useful when creating virtual machines. Microsoft is concerned about their safety, ...

Recently, Microsoft delivered its latest Defender patches for Windows 11 ISOs. These definitions are released from time to time alongside the general security updates available during Patch Tuesday.

Microsoft has released a new Microsoft Defender update package for Windows installation images, refreshing the security protection included with Windows setup media following the August 2026 Patch ...

For most people using a supported and fully updated Windows 11 computer, yes: Microsoft Defender Antivirus and the other protections inside Windows Security are sufficient as the primary antivirus.