Some Windows 11 users say Microsoft’s March 2026 cumulative update, KB5079473, is triggering serious problems including blue screen crashes (BSOD), hard freezes, and repeated restarts. The update targets Windows 11 version 24H2 and 25H2, but Microsoft’s official update page currently states it is “not currently aware of any issues with this update,” creating a noticeable mismatch between user reports and the company’s public status.
Early reports describe Windows 11 instability after installing KB5079473
Complaints began appearing shortly after the patch rolled out, with several users posting in Microsoft-hosted support discussions about systems becoming unstable immediately after installation.
In one thread dated March 12, a user reported their PC “fully crash[ed] 3 times” after installing KB5079473. Each incident forced a full reboot and resulted in lost unsaved work. Others replied with similar experiences, including complete screen freezes that required a hard restart. Another commenter linked the crashes to Zoom use, saying the system repeatedly crashed during screen sharing.
More Windows 11 KB5079473 issues: frequent restarts, BSOD stop codes, and app failures
A separate discussion suggests the problems may vary by system. One user said their computer started restarting every 10 to 20 minutes after the update and recorded a BSOD with the stop code ATTEMPTED_WRITE_TO_READONLY_MEMORY (0xBE).
Another user reported that, following installation, key Windows tools and apps stopped behaving normally. Office and Outlook reportedly would not initialize, and even Command Prompt and Print Screen were said to stop working. The same comment mentioned error code 0x800704b3. There were also reports of the update failing to install at all, with Windows Update repeatedly prompting users to retry.
Microsoft’s KB5079473 page still lists “no known issues”
While user reports continue to stack up, Microsoft’s official KB5079473 support page still lists no known issues at the time of writing. Instead, Microsoft highlights security and reliability-related improvements, including updated targeting data for new Secure Boot certificates, improved File Explorer search reliability, improved WDAC COM allowlisting behavior, and a trust warning improvement in Windows System Image Manager.
This kind of gap isn’t unusual with Windows updates. Community reports often show up first in support threads and feedback channels before Microsoft confirms patterns and adds them to official documentation.
Additional user claims circulating online
Beyond Microsoft’s own forums, posts on Reddit and other communities are also describing problems that appear to align with the broader theme of instability. These include claims of inaccessible system drives on some Samsung Galaxy Book laptops, visual or graphical glitches after installation, and GPU-accelerated application crashes on at least one workstation-class PC. As with any early wave of reports, these claims vary by device and configuration and have not been officially confirmed.
How to report KB5079473 problems to Microsoft
If KB5079473 is causing BSODs, freezing, random restarts, or app failures on your Windows 11 PC, reporting the issue through Microsoft’s Feedback Hub can help surface the problem faster. Users can search for similar reports, upvote existing entries, add their own details, and include screenshots or recordings to support investigation.
Microsoft also notes that pressing Windows key + F opens Feedback Hub and automatically captures a screenshot, making it a quick way to submit a report while the company determines whether the KB5079473 crash and freeze complaints warrant an official acknowledgement or a fix in a follow-up update.
