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...
The latest Windows cumulative update has landed with a thud: a growing number of users report that Windows 11 version 24H2’s August security rollup (KB5063878, OS Build 26100.4946) can make drives disappear under heavy I/O, and the fallout has reignited debates about privacy, platform stability...
26100.4946
ai privacy
copilot+
data backup
data recovery
drives vanish
dual boot
firmware update
hdd
heavy io
i/o errors
it admins
kb5063878
linux migration
recall feature
ssd
storage stack
windows 11
windows updates
wsus
Microsoft’s latest cumulative for Windows 11 24H2 has been tied to a small but serious cluster of storage failures that can make NVMe SSDs disappear during heavy writes and, in a handful of cases, leave data unreadable — a scare that underscores why updating and backup discipline still matters...
24h2
26100.4946
august 2025 update
backup
data backup
data integrity
data recovery
dism
dram-less ssd
enterprise deployment
firmware
firmware update
hardware compatibility
heavy i/o workloads
host memory buffer
it admins
kb5063878
known issue rollback
large writes
nvme
nvme ssd
phison controllers
release health
rollback
sccm
ssd
ssd disappearance
ssd firmware
storage regression
support guidance
vendor diagnostics
windows 11
windows 11 24h2
windows updates
wsus
Microsoft has shipped the August 12, 2025 cumulative security update for Windows 11, version 24H2 (KB5063878, OS Build 26100.4946), a routine Patch Tuesday release that combines the latest servicing stack update with the monthly cumulative update, patches a range of security issues, and contains...