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Windows 11 Preview Updates Add Native Sysmon and Fix Explorer/Taskbar Regressions

windows 11windows insiderwindows explorerexplorer.exe hangpreview updatesysmonkb5074105taskbardesktop iconstask managerkb5074178cumulative updateoptional featureendpoint telemetry
Updated February 4, 2026 at 04:03 AM3 sources
Windows 11 Preview Updates Add Native Sysmon and Fix Explorer/Taskbar Regressions

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Microsoft’s latest Windows 11 preview releases for Insiders and optional updaters introduce native Sysmon and ship fixes for disruptive Windows Explorer/taskbar regressions. Windows 11 Insider Dev Channel Build 26300.7733 (KB5074178) adds Sysmon as a built-in Optional Feature, bringing deeper endpoint telemetry (e.g., process creation with command lines, network connections, driver loads, and file timestamp manipulation) intended to improve forensic visibility and incident investigation; Microsoft notes the integrated Sysmon conflicts with legacy standalone Sysmon installs, requiring removal of the older version before enabling the new feature.

Separately, the optional preview update KB5074105 for Windows 11 24H2/25H2 addresses a January cumulative-update regression where Explorer.exe could hang at startup—causing the taskbar to intermittently disappear and forcing users to restart Explorer via Task Manager—and also fixes reports of desktop icons being rearranged unexpectedly. ZDNET characterizes the upcoming February Windows 11 patch as feature-heavy and indicates KB5074105 is an early look at what will roll into the broader monthly release, while other referenced ZDNET pieces are general OS commentary/comparisons and not tied to the Sysmon integration or the KB5074105 Explorer fix; an Android 17 feature roundup is unrelated.

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