Windows 11 SSD Issues: Investigating the Allegations

In August 2025, Microsoft released the KB5063878 security update for Windows 11, which led to widespread reports from users experiencing significant issues with their SSDs. Users claimed that their drives were disappearing or failing, particularly during high-volume write operations. However, Microsoft has since stated that there is no connection between the update and the reported failures.

Microsoft Confirms Windows 11 KB5063878 Update Not Behind SSD FailureMicrosoft: Windows 11 Not to Blame for Recent SSD IssuesMicrosoft Says Windows 11 Security Update Isn’t Behind Widespread SSD Crashes; The Question Remains, Who’s Really to Blame?Windows 11 SSD failures: Panic or real problem?

Microsoft conducted an investigation into the SSD issues and concluded that the August security update did not cause the problems reported by users. A statement from the Microsoft 365 Admin console noted, “After thorough investigation, Microsoft has found no connection between the August 2025 Windows security update and the types of hard drive failures reported on social media.” The company emphasized its commitment to monitoring feedback and investigating future reports.

Microsoft Confirms Windows 11 KB5063878 Update Not Behind SSD FailureMicrosoft: Windows 11 Not to Blame for Recent SSD IssuesMicrosoft Says Windows 11 Security Update Isn’t Behind Widespread SSD Crashes; The Question Remains, Who’s Really to Blame?Windows 11 SSD failures: Panic or real problem?Phison Refutes Claims of SSD Failures Linked to Recent Windows 11 Updates

Phison, a manufacturer of NAND controllers, was initially implicated in the SSD failures, as many affected drives utilized its technology. The company conducted over 4,500 hours of testing and reported that it could not replicate the issues associated with the KB5063878 update. Phison stated that no confirmed cases of drive failures linked to the updates had been reported by customers or partners. They also clarified that a document circulating online, which purported to list affected Phison controllers, was fake and likely intended to harm their reputation.

Phison Refutes Claims of SSD Failures Linked to Recent Windows 11 UpdatesMicrosoft Says Windows 11 Security Update Isn’t Behind Widespread SSD Crashes; The Question Remains, Who’s Really to Blame?Windows 11 SSD failures: Panic or real problem?Microsoft Confirms Windows 11 KB5063878 Update Not Behind SSD FailureMicrosoft: Windows 11 Not to Blame for Recent SSD Issues

Despite Microsoft and Phison's assertions, user reports on social media and forums indicated that SSDs were failing, particularly when under heavy workloads or when nearly full. Some users noted that their drives would disappear from Windows while transferring large files, especially when the drive was more than 60% full. This has led to speculation that the issues may not be directly caused by the update but could be coincidental, possibly due to pre-existing conditions of the drives.

Microsoft Says Windows 11 Security Update Isn’t Behind Widespread SSD Crashes; The Question Remains, Who’s Really to Blame?

Critics argue that the lack of a clear explanation from Microsoft and Phison leaves users in a state of uncertainty. Many users have expressed frustration over the situation, feeling that their concerns are not being adequately addressed. Some have suggested that the issue might be more widespread than reported, given the volume of user experiences shared online.

Phison Refutes Claims of SSD Failures Linked to Recent Windows 11 Updates

While Microsoft and Phison maintain that the update is not to blame for the SSD failures, numerous user reports contradict this assertion. The inability of both companies to replicate the issues raises questions about the reliability of their testing environments and whether the problem may be more complex than initially thought.

Phison Refutes Claims of SSD Failures Linked to Recent Windows 11 Updates

In light of the ongoing uncertainty, users are advised to exercise caution. It is recommended to avoid transferring large files when SSDs are nearly full and to consider uninstalling the KB5063878 update if they experience issues. Microsoft continues to gather feedback and monitor the situation, but as of now, the exact cause of the SSD failures remains unresolved.

Microsoft Confirms Windows 11 KB5063878 Update Not Behind SSD Failure

• “After thorough investigation, Microsoft has found no connection between the August 2025 Windows security update and the types of hard drive failures reported on social media.” — Microsoft

Microsoft Says Windows 11 Security Update Isn’t Behind Widespread SSD Crashes; The Question Remains, Who’s Really to Blame?

This situation highlights the complexities of software updates and hardware compatibility, leaving users to navigate their concerns amidst conflicting information.

Microsoft Confirms Windows 11 KB5063878 Update Not Behind SSD Failure