Windows Update KB5063878 Can Cause an Issue with your SSD

[JSWolf]

https://www.windowscentral.com/micro...sds-what-to-do

What you need to know about storage issues with Windows 11 update KB5063878

As Nekorusukii explains in a summary of their testing, drives go missing in Windows 11 with SMART data unreadable. You might be able to access the buffered tree, but from there, files cannot be read.

This issue seems to occur when writing large chunks of data to certain drives; it's especially prone to occur if the file size is higher than 50GB and if the drive is more than 60% full. Worse, it appears to happen on SSDs and HDDs.

Should you encounter this issue, a system reboot might recover the drive's working state, but it can recur should you put the drive under the same strain again.

Nekorusukii tested 21 SSDs with a mix of Samsung, WD, Seagate, Corsair, SK hynix, Crucial, Solidigm, ADATA, HP, XPG, and Hanye hardware. From these results, they suspect that it's a Phison NAND controller that's most likely to cause the problem.

The suggested solution is to uninstall KB5063878 and set Windows Update to not update for 5 weeks. If a patch comes out that fixes the issue, you can always re-enable Windows update to get updates soon if that happens.

P.S. It's also said that Update KB5062660 is part of the problem. https://www.bleepingcomputer.com/new...failure-issues

[Sirtel]

Hmm. This update was installed on my main laptop a week ago, and my SSD is about 90% full. So far no issues. True, almost all my files are rather small.

[JSWolf]

Originally Posted by Sirtel

Hmm. This update was installed on my main laptop a week ago, and my SSD is about 90% full. So far no issues. True, almost all my files are rather small.

I've backed off these two Windows updates and paused Windows Update.

[jackm8]

Interesting. I just did a fresh 11 install, and neither of the updates were installed.

[Quoth]

https://www.theregister.com/2025/08/...covery_broken/

https://www.theregister.com/2025/08/...ws_update_ndi/

[nana77]

Originally Posted by Sirtel

Hmm. This update was installed on my main laptop a week ago, and my SSD is about 90% full. So far no issues. True, almost all my files are rather small.

Hi, sorry beacause I don't want to look silly, but just as a suggestion usually keeping a 15-20% of free space on a SSD improves the performance, and reduces its wearing (in a lightweight use cases; even 35% on more demanding tasks).
https://en.wikipedia.org/wiki/Wear_l..._wear_leveling

A flash memory storage system with no wear leveling will not last very long if data is written to the flash. Without wear leveling, the underlying flash controller must permanently assign the logical addresses from the operating system (OS) to the physical addresses of the flash memory. This means that every write to a previously written block must first be read, erased, modified, and re-written to the same location. This approach is very time-consuming and frequently written locations will wear out quickly, while other locations will not be used at all. Once a few blocks reach their end of life, such a device becomes inoperable.

The efficiency of the algorithm that ensures every block is written an equal number of times to all other blocks as evenly as possible

https://en.wikipedia.org/wiki/Write_amplification
(This was OT)

[JSWolf]

Has anyone besides me uninstalled these updates?