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Microsoft Windows 11 24H2 storage disruption after KB5063878 and KB5062660

Service Disruption
First reported
Last updated
Happening score
H score 13
1 unique sources, 1 articles

Summary

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A Windows 11 24H2 update issue is reportedly corrupting some SSD and HDD devices, making storage disappear or stay inaccessible after heavy writes and reboots. The disruption is tied to KB5063878 and KB5062660 and has affected drives using Phison NAND controllers as well as several other models. Users are being told to avoid large sequential writes until a fix is confirmed.

Related Happenings

EDR-Freeze user-mode race condition against Windows Error Reporting and MiniDumpWriteDump

Technical Analysis
First: 22.09.2025 20:07 Last: 22.09.2025 20:07 Sources 1

About this happening: Researchers demonstrated **EDR-Freeze**, a **user-mode** race condition that can freeze **EDR** and antivirus processes on **Windows 11 24H2**, weakening endpoint defenses without...

Open Happening

Timeline

  1. 20.08.2025 14:26 1 articles · 9mo ago

    Japanese user reports Windows 11 24H2 storage failures

    Initial Disclosure

    A Japanese PC building enthusiast reports that Windows 11 24H2 systems with KB5063878 and KB5062660 can make drives with Phison NAND controllers disappear from the OS during heavy write operations, including large-file transfers and many-file writes. Some affected drives recover after a restart, while others remain inaccessible even after reboot.

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  2. 20.08.2025 14:26 1 articles · 9mo ago

    Microsoft and Phison work on a fix for Windows 11 storage failures

    Mitigation Patch Update

    Microsoft has not officially acknowledged the issue, but Phison says it is working with Microsoft to resolve the Windows 11 24H2 storage failures linked to KB5063878 and KB5062660. Until the issue is confirmed and addressed, users are advised to avoid writing tens of gigabytes at once or extracting large archives in a single batch.

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