Topic
Windows 11
Windows 11 is Microsoft’s modern PC operating system, built to deliver a refreshed interface, stronger productivity tools, gaming features, enhanced security, and deep integration with services like Copilot. It launched as the successor to Windows 10 and supports a wide range of desktops, laptops, and compatible hardware configurations for work, play, and everyday computing. | Release Date: October 5, 2021 | Developer: Microsoft | Platforms: x86-64 PCs, Arm64 PCs | Genre: Operating System
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Windows 11 update error 0x800f0991 — working fixes for 24H2
Detailed repairs for KB5060829 and similar cumulative updates when DISM and standard installs fail.
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Windows 11 KB5067036 (Nov 2025 preview) brings a new Start menu
Release Preview builds 26100.7015 and 26200.7015 add a new Start menu, battery percentage, admin protections, and fixes.
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Fix Windows 11 KB5066835 breaking localhost (HTTP/2 bug)
Restore local IIS/Kestrel sites using Windows Update, KIR policy, registry, or safe uninstall.
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Enable new dark mode dialogs in Windows 11 (25H2 Insider)
Turn on hidden dark UI for Run, Folder Options, and file operations with ViVeTool on recent Insider builds.
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Windows 11 25H2 tiny11 on x64 and arm64 — what’s new, how to get it
A lean 25H2 build now exists for Intel/AMD and ARM PCs, with a script to roll your own from official ISOs.
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Factory reset Xbox Ally X on Windows 11 (Reset this PC, BIOS)
Use Windows Reset or ASUS Cloud Recovery to return the handheld to factory defaults, with clear trade‑offs.
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Fix File Explorer’s PDF preview warning in Windows 11 (25H2)
Why File Explorer now blocks some PDF previews and the safe, fast way to restore them for trusted files.
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Is Windows 11 25H2 stable? What to expect before you update
A look at the rollout, known issues, and when it makes sense to install the Windows 11 2025 Update.
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PowerToys Light Switch for Windows — Automatic theme scheduling
Set Windows to switch between light and dark modes by time, sunrise/sunset, or a manual shortcut.
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How to Enable “Hey, Copilot” on Windows 11 — Setup, voice use, and fixes
Turn on the wake word in the Copilot app, start hands‑free voice, and fix common issues with clear steps.