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Windows 11's SSD Breaking Bug Just Got More Mysterious - and I Really Hope Microsoft Can Clear This up Swiftly

Phison conducted over 4,500 testing hours and 2,200 cycles with no failures found in SSDs with their controllers after Windows 11 updates, addressing compatibility concerns.

  • On August 18, Phison said it was made aware of Windows 11 updates KB5063878 and KB5062660 and dedicated over 4,500 testing hours and more than 2,200 cycles but failed to reproduce the reported SSD failures.
  • Following reports from users and community tests, the Windows 11 24H2 update KB5063878 was flagged for causing SSD disappearance, freezes, and data corruption, with X user Necoru_cat testing nearly two dozen models and finding major data loss.
  • Phison also flagged a falsified document online and advised, `We continue to advise users that for extended workloads, such as transferring large files or decompressing large archives, make sure a proper heatsink or thermal pad is used with the storage device.`
  • Community reaction was divided over reports, while Microsoft solicited feedback last week and continues investigating; Phison support remains committed to assisting customers amid the dispute.
  • After its investigation, Phison concluded the incident may be a false alarm and said it will continue monitoring Windows updates with partners to ensure reliability.
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The cause of the SSD freeze issue caused by a Windows 11 update remains unknown. Phison Electronics has failed to replicate the issue after 4,500 hours of testing, and Microsoft has been unable to identify an anomaly through telemetry data or internal testing. Silicon Motion stated that its main control chip is not affected. The issue may be related to a specific device combination, and users are advised to use a heat sink to avoid thermal throt…

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HotHardware broke the news in on Wednesday, August 27, 2025.
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