Microsoft 365 Alert – Service Degradation – Windows 365 – Users may experience boot up failures for Windows 365 Cloud PCs – RESOLVED

Announcements Sourav Nandi

30/05/2025 08:25:00 AM

NHSmail Reference: INC46541435

Microsoft Reference: WP1084765

Issue Status: RESOLVED

Issue Description: Users may experience boot up failures for Windows 365 Cloud PCs.

More info: Users who have installed the Windows update KB 5058405 and are running Microsoft Windows 11, version 22H2 and 23H2 may be impacted and may see boot failures and blue screens. We advise our customers to refrain from installing Windows update KB 5058405 to prevent impact.

The following link contains recovery options for users impacted by this event: https://learn.microsoft.com/en-us/windows/release-health/status-windows-11-23h2

Final Update: 02/06/2025 08:55:00 AM – Microsoft have completed the deployment of the code fix to address the impact, and they have validated through a period of monitoring the service health telemetry that impact has been resolved by our actions. This issue is resolved in the out-of-band (OOB) update KB5062170 (https://support.microsoft.com/en-us/topic/may-31-2025-kb5062170-os-builds-22621-5415-and-22631-5415-out-of-band-fb7ab9b6-c874-41cf-b962-c674482aa24d), which is only available via the Microsoft Update Catalog (https://www.catalog.update.microsoft.com/Search.aspx?q=KB5062170).

Scope of impact: Any user may be impacted by this event and experience boot failures on virtual machines.

Root cause: A recent Windows update contains a code issue that’s causing boot-up issues, leading to impact

Next Steps: Microsoft are analyzing the recent Windows update with the code issue to better understand how this piece was missed and how to avoid impact in the future.