microsoft defender

Microsoft’s June 2026 Windows 11 security update arrived on June 9 as part of Patch Tuesday, delivering fixes for roughly two hundred Microsoft vulnerabilities across Windows and related products while also rolling in Windows 11 feature and reliability changes. The release is big enough to...

A security researcher using the name Nightmare Eclipse released a new Windows zero-day called RoguePlanet on June 10, 2026, hours after Microsoft’s June Patch Tuesday, claiming it can make Microsoft Defender spawn a SYSTEM-level command prompt on patched Windows 10 and Windows 11 machines. The...

Microsoft’s June 2026 Patch Tuesday for Windows 11 is scheduled for June 9, bringing the usual security fixes alongside new user-facing features such as low-latency performance boosts, Shared Audio, richer NPU monitoring, setup-time user-folder naming, and Secure Boot certificate updates. The...

Windows 11 Pro security alerts usually come from the Windows Security app, Microsoft Defender Antivirus, SmartScreen, or Smart App Control, and they are meant to push users toward a specific next action: re-enable protection, quarantine a file, review a blocked download, or stop an untrusted app...

Windows 11 users choosing antivirus software in 2026 should start with Microsoft Defender as the baseline, then consider Bitdefender Total Security, Norton 360 Deluxe, ESET, or Kaspersky only if they need stronger bundled features, lighter tuning, family controls, identity monitoring, VPN...

Microsoft has refreshed the Microsoft Defender update package for Windows installation images in June 2026, updating offline WIM, VHD, and ISO deployment media for Windows 11, supported Windows 10 servicing channels, and Windows Server releases with newer antimalware platform, engine, and...

Microsoft has refreshed its offline Microsoft Defender update package for Windows installation images, bringing WIM and VHD media for Windows 11, Windows 10, and supported Windows Server releases up to Defender package version 1.447.236.0 with platform version 4.18.26040.7 and engine version...

Huntress is positioning its Microsoft partnership as an SMB security force multiplier, using its Microsoft-verified SMB Solution status and Microsoft Intelligent Security Association membership to wrap managed EDR, identity threat detection, and 24/7 SOC response around Microsoft Defender...

Microsoft has quietly removed an April 2026 Windows Learning Center article that said most Windows 11 users do not need third-party antivirus software, replacing a blunt pro-Defender message with older, more cautious guidance that frames built-in protection as strong but not universal. The...

Windows users asking whether they still need antivirus software in 2025 are really asking whether Microsoft Defender, built into Windows 10 and Windows 11, is good enough for ordinary malware protection without a paid third-party suite. The honest answer is yes for many home PCs, but that answer...

Microsoft published a June 3, 2026 customer story describing how Soleno Therapeutics, a U.S. rare-disease biotech working with Microsoft partner Netwoven, deployed Microsoft Defender and Microsoft Purview capabilities through Microsoft 365 Business Premium to unify security, information...

Microsoft appears to have removed an April 9 Windows Learning Center article titled “Best antivirus software for 2026: The built-in Windows protection you need,” after the page argued that many Windows 11 users do not need third-party antivirus software. The vanished page now redirects to...

Nightmare Eclipse, the Windows zero-day researcher also known as Chaotic Eclipse and Dead Eclipse, was removed from GitHub around May 23 and GitLab on May 26–27, 2026, after publishing weaponized exploit code and threatening a July 14 release aimed at Microsoft. The dispute is now bigger than a...

Hello, I've been using a competitor's antivirus on my Windows 11 Home 25H2 for several years. I'm thinking of switching to Microsoft Defender. I'd like information on whether this new product maintains the same level of security as before in terms of detecting intrusions that could damage the...

Microsoft disclosed CVE-2026-45584 on May 19, 2026, as a critical remote code execution flaw in the Microsoft Malware Protection Engine, affecting engine versions through 1.1.26030.3008 and fixed in version 1.1.26040.8 across Defender-backed antimalware products. The bug is a reminder that...

Microsoft disclosed CVE-2026-41091 on May 20, 2026, as a high-severity Microsoft Defender elevation-of-privilege flaw in the Microsoft Malware Protection Engine, fixed in engine version 1.1.26040.8 after affecting version 1.1.26030.3008 and earlier. The bug is not a classic “click this file and...

Microsoft disclosed CVE-2026-45498 in May 2026 as a denial-of-service vulnerability in the Microsoft Defender Antimalware Platform, affecting platform version 4.18.26030.3011 and earlier and addressed first in version 4.18.26040.7, which is delivered through Defender’s normal update machinery...

Gizmodo’s 2026 roundup of free antivirus tools for Windows 10 names Avira, Malwarebytes Free, and Microsoft Defender among the options still relevant after Windows 10’s October 14, 2025 support cutoff, but the larger story is that antivirus choice now sits inside a shrinking runway for the...

CISA added seven vulnerabilities to its Known Exploited Vulnerabilities Catalog on May 20, 2026, including five legacy Microsoft and Adobe flaws from 2008 through 2010 and two 2026 Microsoft Defender vulnerabilities, after determining that all seven have evidence of active exploitation. The...

Microsoft Defender Security Research on May 12, 2026, described an AI-assisted research pipeline that turns attacker tactics, techniques, procedures, and concrete actions into realistic synthetic security logs for use in detection engineering across Defender-style endpoint, identity, cloud, and...