Anyone who had been hoping that 2026 would be a better year in terms of Microsoft releasing reliable updates for Windows 11 will have been disappointed.
We have already seen numerous issues being caused by Microsoft’s operating system updates, leaving the company mopping up the problems it has caused. A recent spate of UNMOUNTABLE_BOOT_VOLUME errors and boot problems was tracked back to one such buggy update, and Microsoft has now resolved it.
The problem resulted in people seeing error messages reading “Your device ran into a problem and needs a restart. You can restart”. Microsoft has now revealed that it was fixed by the recently released KB5077181 update, but – somewhat strangely – the company did not make this announcement publicly.
The news comes courtesy of Bleeping Computer sharing information seen by Ask Woody.
The site says:
Microsoft says it has resolved a Windows 11 bug that caused some commercial systems to fail to boot with an “UNMOUNTABLE_BOOT_VOLUME” error after installing recent security updates, with the fix delivered in the February 2026 Patch Tuesday update.
The boot issue, which Microsoft previously investigated and linked to failed December 2025 updates, affected a limited number of commercial Windows 11 devices running versions 25H2 and 24H2.
According to a private enterprise advisory seen by Susan Bradley of Ask Woody, the issue has now been marked as fully resolved in the Windows 11 KB5077181 security update released on February 10, 2026.
In an advisory notice seen by Ask Woody, Microsoft says that “This issue is fully resolved in the Windows security update released on February 10, 2026 (the Resolved KBs listed above), and later updates”.
It is not entirely clear why Microsoft did not make this announcement publicly, but it could be because of the fact that it was commercial users who were affected. It could be that the company did not want to draw attention to an issue that did not affect the majority of people – and we could debate why this might be the case. It might have been to avoid fearmongering, or it could be an attempt to avoid increasing the negative feelings that so many people have built up towards Windows 11.
