The August 2025 cumulative update for Windows 11 (KB5063878) has sparked widespread discussion in the IT and tech community. While Microsoft released this update to improve performance, enhance security, and introduce new AI-powered features, users around the globe are reporting serious issues with SSD reliability after installing it.
Reported Problems
Shortly after the update rolled out, reports surfaced that some SSDs were disappearing, becoming corrupted, or failing entirely under certain conditions. Most commonly, this happened during heavy write operations—such as downloading large game updates or transferring 50GB+ files to drives that were already 60% full.
A number of community tests claimed that affected SSDs (especially those using Phison NAND controllers) would become inaccessible until a reboot, and in rare cases, completely unrecoverable.
JayzTwoCents on YouTube Weighs In
Popular tech YouTuber JayzTwoCents posted a warning video highlighting how these issues may appear even during gaming workloads—not just heavy data transfers. He also pointed out that some users reported problems persisting even after uninstalling KB5063878.
This suggests the issue may go deeper than just one Windows update, potentially involving SSD firmware and controller driver compatibility with Windows 11 24H2.
Microsoft and Phison’s Response
Microsoft and Phison have conducted extensive internal testing:
Over 4,500 cumulative hours of SSD stress testing
More than 2,200 test cycles across multiple SSD models
So far, they have been unable to reproduce the failures under lab conditions. Based on telemetry and partner reports, Microsoft currently states there is no confirmed link between KB5063878 and widespread SSD corruption.
What This Means for You
While official testing downplays the risks, real-world user reports should not be ignored. If you’re running Windows 11 with this update installed, especially on systems using Phison-based SSDs, it’s worth taking precautions:
✅ Backup your data using the 3-2-1 rule (3 copies, 2 different media, 1 off-site or cloud).
✅ Avoid heavy file transfers or large game installs until more clarity is available.
✅ Keep your SSD firmware up to date via the manufacturer’s tools.
✅ Monitor system behaviour after the update—look out for disappearing drives, unusual errors, or sudden restarts.
✅ Consider uninstalling KB5063878 if you experience instability, though keep in mind that JayzTwoCents and others have suggested this may not fully resolve the issue.
How to Uninstall KB5063878
If you believe KB5063878 is causing issues on your PC, you can safely remove it. Here are two methods:
Method 1: Using Settings
Press Windows Key + I to open Settings.
Go to Windows Update > Update History.
Scroll down and click Uninstall updates.
In the list, locate KB5063878.
Select it and click Uninstall.
Restart your PC when prompted.
⚠️ Note: Removing this update will also remove any security patches included in KB5063878. If you uninstall it, be sure to monitor Microsoft’s site for replacement patches or future fixes.
Our Recommendation
At All I.T. Solutions (QLD), we advise our clients to approach KB5063878 with caution until Microsoft provides a definitive fix. If your business relies on SSD-heavy workloads (gaming, CAD, video editing, large data transfers), you may want to pause this update temporarily.
We will continue monitoring Microsoft’s official communications, SSD manufacturer advisories, and community reports—including updates from JayzTwoCents and other trusted tech voices.
🔹 Need help? If you’ve installed KB5063878 and are experiencing storage issues, reach out to us. We can assist with diagnostics, data recovery, and update management to keep your systems secure and stable.
