Microsoft announced price increases for Microsoft 365 and Office 365 commercial subscriptions. The new list prices will go into effect on July 1, 2026, though existing customers will generally not pay the higher rates until their next renewal after that date. The company justifies the changes by pointing to more than 1,100 new features added across the platform, particularly AI-powered capabilities, security enhancements, and device management tools.

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Microsoft introduced a Common Vulnerabilities and Exposures (CVE) report within Windows Autopatch, providing security teams with consolidated visibility into Windows vulnerabilities, patch status, and affected devices across their organization. The feature integrates vulnerability tracking directly into the Microsoft Intune admin center alongside existing Windows quality update reports.

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Microsoft has expanded the Windows 11 version 25H2 rollout in December 2025, entering a new phase of broad deployment for eligible devices, though it is not yet available on every device simultaneously. The update, which uses machine learning to determine when to offer the upgrade to eligible devices, continues to be rolled out gradually.

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Microsoft released Windows 11 Insider Preview Build 26220.7344 (KB5070316) to the Dev and Beta Channels on December 5, 2025, delivering native support for the Model Context Protocol, the Unified Update Orchestration Platform, and Windows MIDI Services. The update also includes improvements to Quick Machine Recovery and the "Open With" dialog, as well as fixes for File Explorer, Windows Hello, and system stability issues.

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Microsoft's optional KB5070311, a preview update for Windows 11 versions 24H2 and 25H2 with several new features, has caused multiple issues affecting File Explorer's dark mode, installation stability, and compatibility with Intel Arc graphics cards. Released on December 1, 2025, the update was designed to enhance dark mode consistency, but instead created a problematic user experience for many Windows 11 users.

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Microsoft released KB5070311 on December 1, 2025, the final non-security preview update for Windows 11 versions 24H2 and 25H2 in 2025. The update delivers AI-exclusive features for Copilot+ PCs, introduces Virtual Workspaces for system management, and enhances File Explorer's dark mode experience.

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A known bug in Windows 11 causes the password icon to become invisible or missing from the lock screen sign-in options after installing specific Windows updates released since August 2025. Although the button remains functionally available, it is not visible to users, requiring them to hover over a blank space to access the password field.

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In a previous blog post, I reviewed the new features of Proxmox VE 9.0. Proxmox VE 9.1 arrives with several impactful upgrades, including the ability to create LXC containers directly from OCI images, eliminating the need for separate LXC templates. The release also introduces qcow2-based TPM state storage for fully snapshot-friendly vTPM setups and adds granular nested-virt CPU flag control for more flexible virtualization. Alongside an improved SDN interface and core component updates, these enhancements significantly reduce admin friction and streamline VM and container management.

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Agent Workspace is an experimental feature in Windows 11 that creates a separate, contained environment where AI agents can operate autonomously in the background. Microsoft is introducing this capability as part of its vision to transform Windows 11 into an AI-native operating system, allowing AI to perform complex tasks while users continue their regular work uninterrupted.

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Microsoft is working to resolve an issue that prevents users from opening Excel email attachments in the new Outlook client when the filenames contain non-ASCII characters. The bug affects Exchange Online customers and displays an error message that reads, "Try opening the file again later."

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Microsoft is integrating app updates directly into Windows Update settings in preview builds of Windows 11, allowing users to keep applications up to date without launching the Microsoft Store. The new feature appears as an "App updates" page within Settings > Apps, designed to provide an alternative update mechanism for environments where the Microsoft Store is unavailable or restricted.

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OPNsense firewalls can also function as DHCP servers. IP addresses are then assigned directly at the point where network separation and packet filtering take place. The firewall manages all active hosts, controls their assignment to VLANs and segmented networks, and documents each allocation in its own lease tables.

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Microsoft will retire the legacy Windows Internet Name Service after Windows Server 2025, strongly encouraging organizations to transition to DNS by November 2034.

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Microsoft announced a series of significant security and resilience features coming to Windows 11 in 2026 at Ignite 2025. The updates focus on improving system recovery capabilities, enhancing encryption performance, and strengthening threat detection through native integration of advanced monitoring tools.

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The bug was caused by the Windows 11 Media Creation Tool version 26100.6584, released September 29 2025, which could close unexpectedly when used on Windows 10 devices. The bug was addressed in the update KB5067036 (OS builds 26100.7019 / 26200.7019), released on October 28, 2025. KB5067036 also introduces several new Windows 11 features, including a redesigned Start menu, improvements to File Explorer, Copilot shortcuts, colorful battery icons, enhanced taskbar performance, updated shutdown behavior, and new security features such as Administrator Protection.

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Microsoft began automatically upgrading Windows 11 Home and Pro devices from version 23H2 to 25H2 on November 11, 2025, following the end of support for consumer editions. This mandatory update ensures that devices continue to receive security patches and maintain protection against vulnerabilities. This article outlines the technical requirements for the update, provides manual installation procedures, and explains methods to postpone the automatic upgrade temporarily.

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Microsoft launched the new Azure Network Security Hub, providing a centralized interface for managing Azure Firewall, Web Application Firewall, and DDoS Protection services. The hub expands and rebrands Azure Firewall Manager to reflect broader network security capabilities.

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Microsoft announced a new virtualization mode in Windows Admin Center, specifically designed for managing Hyper-V infrastructure. This mode allows centralized control of hosts, clusters, storage, and networking. Positioned as Microsoft's alternative to VMware vCenter Server, this new mode complements the existing administration mode by focusing specifically on large-scale virtualization environments.

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A blog post by Matthew Prince, Cloudflare's CEO, suggests that Cloudflare repeated CrowdStrike's mistake: updating the entire infrastructure without first testing on a small group of hosts. As a result, large portions of the internet, including 4sysops, were inaccessible for several hours. Apologies for the latter. While most news sites reported that 20% of internet traffic was affected, the actual impact was much higher because the outage disproportionately affected high-traffic, top-ranking websites like X, ChatGPT, Perplexity, and Spotify. While Cloudflare's CEO blames a manual database permissions change, the incident exposes a deeper design flaw: a single engineer can disrupt massive portions of global internet infrastructure. In contrast, blockchain networks like Ethereum demonstrate how truly decentralized systems can prevent such single points of failure.

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