Werk #19190: Prevent crash of Windows agent if WMI is not accessible

Component

Checks & agents

Title

Prevent crash of Windows agent if WMI is not accessible

Date

Mar 2, 2026

Level

Prominent Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.6.0b1 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.5.0b1	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.4.0p23	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Previously, the Windows agent would crash and restart when WMI (Windows Management Instrumentation) was unavailable — a rare but possible situation on some Windows systems.

This has been fixed. The agent now handles WMI connectivity failures gracefully. No action is required.

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