Windows 11 KB5077241 update improves BitLocker, adds Sysmon tool

**Windows 11 KB5077241 (February 2026 preview):** Microsoft released an optional, non-security preview update for Windows 11 (builds 26200.7922 and 26100.7922) that delivers quality and feature improvements — including BitLocker recovery reliability fixes, a taskbar-accessible network speed test, native (disabled-by-default) System Monitor (Sysmon) functionality, automatic Quick Machine Recovery enablement for certain Pro devices not domain-joined, WebP desktop background support, and RSAT availability on Arm64 — and does not include security fixes.