- Microsoft says it has found no link between the Windows 11 update and SSD failures.
- Phison performed over 4.500 hours of testing without being able to reproduce the bug.
- Reports focus on write-intensive loads and drives with more than 60% occupancy.
- It is recommended to make backup copies and avoid very large transfers until the source is clear.
The conversation about a possible SSD failure related to Microsoft has taken a turn after several days of reports and exchanges of statements. The company now maintains that, after analyzing the case with his partners, There is no evidence linking the latest Windows 11 update with the incidents reported by some users.
Even so, those who claim to have been affected describe very specific and repeated symptoms, so the investigation remains openIn this article, we compile what has been officially announced, what conditions are repeated in the reported cases, and what precautionary measures should be applied while all the details are clarified.
What has been reported and when

The first warnings came in mid-August: after installing certain - mainly KB5063878 and, to a lesser extent, KB5062660—, some computers stopped recognizing their storage drives during intensive write operations.
En Multiple testimonies repeat two conditions: Trying to move or save more than 50GB of data at once and having the drive over the limit 60% of its capacityIn these scenarios, some users report that the drive disappeared from the system, and even from the UEFI/BIOS, although in some cases a simple reboot brought the drive back to life.
Initial reports include posts from communities like Reddit and local forums—with early mention of Japanese users—, always with the pattern of heavy loads and prolonged writing work as a trigger for the problem.
Microsoft's official position

After opening an investigation and collaborating with several manufacturers, Microsoft maintains that no relationship found between the August security update and the described flaws. According to the company, Neither internal testing nor telemetry shows an increase in incidents after installing the patch..
In addition to laboratory verifications, The Redmond company says it has not been able to reproduce the bug in updated test environments., and will continue to collect data on new cases to narrow down any possible causes. For reference, Microsoft has acknowledged serious problems in the past when there was solid evidence, which gives context to its current denial of involvement.
What the industry says: The Phison case

The controller manufacturer Phison It reported that it has completed more than 4.500 hours of testing and some 2.200 test cycles without being able to replicate the failures.. It also assures that its partners and clients have not reported any consistent incidents through formal channels.
In parallel, the sector points to operational factors that could aggravate abnormal behavior under load, such as a poor heat dissipation in certain configurations. Without stating a single cause, the industry agrees with Microsoft that, as of today, there is no conclusive evidence that incriminates the update.
Cited models and common conditions in the cases

In the complaint threads there are references to units such as Corsair Force MP600, SanDisk Extreme Pro, series of Kioxia Exceria, controllers Maxio, InnoGrit and models with controllers PhisonIsolated cases are also mentioned, such as a WD Blue SA510 (2 TB), always under continuous writing loads and with the drive quite full.
It is important to emphasize that, compared to the installed fleet of SSD, the number of reports remains low. Although the symptoms—disappearing drives, read/write errors, and sometimes data corruption—sound serious, The scale suggests isolated incidents rather than widespread failure.
Precautionary measures and recommended steps

Without firm indications pointing to an update, it is advisable to apply a reasonable prudence while data continues to be collected. These guidelines help minimize risks in high-load scenarios.
- Take the regular backups of your critical files (local and/or cloud).
- Evita, if possible, transfers of tens of gigabytes when the SSD is above 60% utilization.
- Check the SMART status and temperature of the unit; consider heat sinks or thermal pads if you work with intensive loads.
- Keep up to date firmware and drivers storage; consider temporarily pausing Windows Update if you notice strange behavior.
- If the computer stops recognizing the drive, try a reboot and, if it persists, reports the case for the official support channels.
With these measures, and pending further data, most users should be able to continue working with normal, reducing exposure to extreme scenarios that appear to be behind the cases described.
The current photograph is clear: Both Microsoft and several hardware players indicate that there is no evidence that the Windows 11 update is the direct cause of SSD failures.Meanwhile, the technical community remains attentive to new reports and to finding the key that explains why a problem that does not appear in controlled tests is reproduced in a few configurations.
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