known-issue-rollback

Microsoft and community reports confirm that the August 12, 2025 cumulative update for Windows 11, version 24H2 (KB5063878, OS build 26100.4946) experienced delivery failures when distributed through on‑premises update infrastructure—principally Windows Server Update Services (WSUS) and...

Microsoft’s August cumulative update intended to close a Windows Installer privilege‑escalation hole instead tightened the User Account Control (UAC) rules so aggressively that standard (non‑administrator) users now see unexpected UAC prompts and, in many cases, cannot complete everyday app...

Microsoft has confirmed that its August 12, 2025 cumulative security update introduced a security hardening to Windows Installer that is triggering unexpected User Account Control (UAC) prompts and breaking silent MSI repair/configuration flows for standard (non‑administrator) users across a...

Microsoft has acknowledged a compatibility regression introduced by the August 12, 2025 cumulative Windows updates that can cause unexpected User Account Control (UAC) elevation prompts and MSI Error 1730 failures for non‑administrator users when applications trigger Windows Installer (MSI)...

Microsoft has confirmed that its August 12, 2025 cumulative updates — most notably KB5063878 for Windows 11 (OS Build 26100.4946) and companion packages for Windows 10 and Windows Server — introduced a UAC-related regression that prevents many non‑administrator users from performing routine...

Enterprise administrators are reporting that Windows Update error 0x80240069 appears when deploying the August cumulative update KB5063878 through WSUS or SCCM, while the same package installs cleanly via Windows Update and manual downloads. The pattern points to a delivery path problem in...

Phison has publicly disowned a circulated advisory that claimed Windows 11’s August cumulative update was uniquely “killing” Phison‑based SSDs, while the vendor — and several independent labs — simultaneously confirm an industry‑wide storage regression tied to the August 12, 2025 cumulative...

Microsoft and SSD vendors have opened an investigation after multiple independent testers and users reported that the August 12, 2025 Windows 11 cumulative update (KB5063878, OS Build 26100.4946) can cause some NVMe and SATA drives to stop responding, vanish from the operating system, and — in a...

Microsoft’s August cumulative for Windows 11 — released as KB5063878 (OS Build 26100.4946) — is now at the center of a rapidly developing reliability story: independent testers and multiple tech outlets report that, under sustained large writes (commonly cited around 50 GB and above), some NVMe...

The August cumulative for Windows 11 — identified as KB5063878 (OS Build 26100.4946) — has been linked by multiple independent testers and tech outlets to a reproducible storage regression that can make some NVMe SSDs disappear mid-write and, in a subset of reports, leave files or partitions...

Last week’s August Patch Tuesday delivered the usual mix of security fixes and servicing updates — and with it a familiar enterprise headache: a cluster of delivery- and recovery-related regressions that have already prompted Microsoft to issue targeted mitigations and begin emergency servicing...

Microsoft’s August cumulative for Windows 11 (KB5063878, OS Build 26100.4946) has been tied in independent community testing and aggregation threads to a serious storage regression that can render certain NVMe SSDs inaccessible during large, sustained write operations — and administrators also...