Microsoft has updated its Windows 11 documentation to describe a recently discovered issue tied to the February 2026 Patch Tuesday update (KB5077181). On certain machines—predominantly Samsung consumer laptops—installing that update can result in an error that prevents access to the system drive, showing “C: is not accessible – Access denied.” The problem can go beyond a simple File Explorer error
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March 10, 2026 — KB5079473 for Windows 11 (OS Builds 26200.8037 and 26100.8037)
Microsoft released KB5079473 on March 10, 2026. The update is identified by the OS builds 26200.8037 and 26100.8037 and appears on Microsoft’s support site as a cumulative update for Windows 11. What the entry shows KB identifier and date: The article is titled “March 10, 2026 — KB5079473 (OS Builds 26200.8037 and 26100.8037)” and is published on Microsoft’s official support
Microsoft Active Directory Domain Services Vulnerability (CVE-2026-25177) — What Administrators Need to Know
In early March 2026, Microsoft released an important security update addressing a high-severity vulnerability in Active Directory Domain Services (AD DS) tracked as CVE-2026-25177. The flaw received a CVSS score of 8.8 and can allow an authenticated network actor with limited permissions to escalate privileges to full SYSTEM on a targeted domain controller. Microsoft and third-party researchers coordinated fixes and
Zombie ZIP: How Malformed Archives Can Hide Malware from Security Scanners
A new archive-manipulation technique called “Zombie ZIP” lets attackers conceal payloads inside ZIP files in a way that can evade many antivirus and endpoint detection solutions. The method was described by security researcher Chris Aziz of Bombadil Systems and has drawn warnings from CERT/CC and the wider security community. This post explains how Zombie ZIP works, what research and evidence
Microsoft .NET Out-of-Bounds Read (CVE-2026-26127) Causes Remote Denial-of-Service Risk
Microsoft has issued an emergency security update to address a newly disclosed vulnerability in the .NET ecosystem that can be triggered remotely and results in denial-of-service (DoS) conditions. The flaw, tracked as CVE-2026-26127, affects multiple .NET runtime and package versions across Windows, macOS, and Linux. Administrators and developers should prioritize applying the available patches to prevent service disruption. What the
Microsoft Copilot Cowork: Automating Multi-Step Workflows Inside Microsoft 365
Microsoft announced Copilot Cowork as a new Copilot capability for Microsoft 365 that moves beyond single-response assistance to plan-and-execute workflows across Microsoft 365 apps and files. Cowork converts a user’s intent into a structured plan, runs the plan across supported apps and data sources, and surfaces checkpoints that require user confirmation before applying changes. The feature is positioned to operate