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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Windows 10 devices enrolled in Extended Security Updates may experience installation failures when attempting to install the November 2025 security update (KB5068781). There were some problems installing updates, but we'll try again later. "Error encountered: If you keep seeing this and want to search the web or contact support for information, this may help: (0x800f0922)." The issue affects a specific subset of commercial customers using cloud-based licensing activation. This ESU issue appears to be unrelated to the error, 'We can't enroll you in Extended Security Updates right now,' because the enrollment error prevents access to ESU updates, while the current issue affects installation on devices that are already enrolled. Microsoft now released the KB5072653 update to fix the 0x800f0922 error.

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Microsoft's announcement to transform Windows 11 into an agentic operating system has sparked widespread criticism from users and developers. The company's Windows chief, Pavan Davuluri, disclosed plans to evolve Windows into a system that connects devices, cloud, and AI to enable autonomous task execution. However, the response from the tech community has been overwhelmingly negative, forcing Microsoft to address concerns about the platform's direction. The backlash has brought AI skeptics and change-resistant IT professionals into the open.

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Microsoft's October 2025 security updates are causing unexpected BitLocker recovery prompts on certain Windows devices. The issue primarily affects Intel-based systems with Modern Standby support and requires users to enter their recovery key before normal operation resumes. However, some users have reported that the BitLocker recovery prompt persists on subsequent reboots, requiring repeated entry of the recovery key rather than being a one-time occurrence.

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This guide walks you through the process of installing the WSUS (Windows Server Update Services) role and migrating your configuration and data to Windows Server 2025. You'll perform a clean setup to ensure a stable, efficient patch management environment on the latest Windows Server release. Follow these steps to safely move WSUS settings, groups, and approvals, and prepare your system for long-term support.

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