Last week’s August update from Microsoft has raised concerns among Windows 11 users regarding SSD storage devices. The focus of these issues revolves around update KB5063878, which was released as part of Microsoft’s monthly Patch Tuesday security updates. Reports indicate that this update may cause certain SSDs to become undetectable by the system, leading to potential file corruption.
As of now, Microsoft has not publicly acknowledged or confirmed any flaws associated with this update. The reports are sporadic, suggesting that the issue may only arise under specific conditions. ITPro reached out to Microsoft for a comment but has yet to receive a response.
The initial reports surfaced from a user in Japan on social media platform X, indicating that the problem appears to manifest when SSDs are approximately 60% full after writing around 50GB of data. Notably, SSDs utilizing Phison NAND controllers seem to be particularly susceptible, although the issue appears to span across various SSD manufacturers. ITPro has also contacted Phison for further clarification.
In addition, a thread on Reddit has garnered multiple user reports echoing similar experiences, predominantly originating from Japan. Users have noted that the fault occurs following the writing of substantial data volumes, resulting in Windows 11 failing to recognize the affected drives. There are indications that some HDDs may also be impacted by this flaw.
While the precise cause of the issue remains unverified, it may not stem directly from a defect in Microsoft’s code. Users who are apprehensive about the situation may consider postponing the installation of the update. This is not the first instance of Microsoft encountering flaws within a cumulative update; a patch released last year was linked to the infamous Blue Screen of Death crashes.
Elsewhere in the Windows 11 update
The Windows 11 patch for 24H2 and 23H2 systems, issued last week, included security updates addressing 119 vulnerabilities across all Microsoft software, along with several minor usability enhancements. Among the new features is quick machine recovery, aimed at assisting devices that experience critical boot errors. However, aside from the potential SSD complications, users have reported other issues stemming from the update.
According to a support document from Microsoft, some users encountered error codes when attempting to install the update, particularly when deployed via Windows Server Update Services. This issue is likely to affect business and enterprise users more than home users. Microsoft has since resolved this problem, advising those with failed installations to refresh and resync with the update services before trying again.
Additionally, Microsoft acknowledged that users might encounter an error related to the “Microsoft Pluton Cryptographic Provider” failing to load due to initialization issues. The company clarified that this pertains to a feature still in development and will not adversely affect current Windows functionality, thus requiring no immediate action from users.
Beyond this update, Microsoft has alerted Windows 10 users to upgrade to Windows 11 ahead of the impending end of support in mid-October. Those who are unable or unwilling to transition to the newer operating system can enroll in Microsoft’s Extended Security Updates program to continue receiving monthly security updates.
Furthermore, Microsoft has issued a warning regarding the expiration of Windows Secure Boot certificates in June 2026, urging both individuals and businesses to update their devices in advance to avoid any secure boot failures.
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