Industry observers note that as reported by Windows Current, the June patch KB5094126 (Build 26200.8655), which rolled out on June 9th 2026, is causing boot failures, blue screens, and BitLocker recovery loops on certain devices. A recent Windows 11 patch is causing significant problems for some users during system startup and in everyday use.
The report highlights that it also introduces fresh functions, such as a low-latency profile and the associated performance improvements. The patch is considered important because, according to Microsoft, it patches around 200 security vulnerabilities, including several critical flaws and zero-day exploits.
As part of the ongoing story, instead, they encounter blue screens or the BitLocker recovery screen, which requires entry of the recovery key. (A similar issue is also affecting some Windows 10 users, although for different reasons). Following installation, some users report that Windows 11 no longer starts normally.
According to the latest update, those mentioned include:. According to Windows Current, business devices from various manufacturers, including HP and Dell, appear to be affected.
According to the latest update, in some cases, devices get stuck in a boot loop and are difficult to restore to normal operation.
The report highlights that according to Windows Current, the problem is likely related to changes in Secure Boot and the EFI system partition.
Industry observers note that on systems with very small EFI partitions (sometimes as little as 100 MB), there may not be enough free space available. Windows showcase logs reportedly contain TPM-WMI errors including insufficient space in the EFI partition. The patch refreshes Secure Boot certificates and writes fresh boot components.
As part of the ongoing story, hP systems may be especially vulnerable, as firmware and recovery data are sometimes stored in the EFI partition and take up further space.
The report highlights that in the worst cases, Secure Boot may block the system from starting, or Windows may display error code 0xc0430001 and enter BitLocker recovery.
The report highlights that affected users report that the problem can sometimes be circumvented by making a change in the BIOS:.
In a fresh development, it’s also recommended that you patch the BIOS or UEFI to the most recent version, as outdated firmware may also be a factor, according to the report.
The report highlights that after installing KB5094126, some users report issues with OneDrive after installing KB5094126.
As part of the ongoing story, clicking on the cloud storage icon sometimes produces no response. OneDrive may no longer open correctly from File Explorer, and access through the sidebar or system tray may become unresponsive.
According to the latest update, according to Windows Current, Dropbox and iCloud Drive have also been affected in isolated cases, though reports are far less common.
According to the latest update, the issue appears to affect File Explorer integration. The files themselves remain accessible, for example through the direct user folder.
Industry observers note that this primarily affects specialized applications in the medical and accounting sectors that use Word in the background for document creation. The patch is also reported to disrupt the integration of Microsoft Word with third-party programs in certain enterprise environments.
In a fresh development, word itself continues to function, but automated or embedded workflows may sometimes fail.
As part of the ongoing story, as a result, customized folder views or icons may no longer display correctly if the file is classified as untrusted. Microsoft has also made changes to the desktop.ini file.
As part of the ongoing story, however, according to Windows Current, as well as reports in the Feedback Hub and on Reddit, reports from affected users are mounting. These issues have not yet been confirmed by Microsoft.
According to the latest update, it remains unclear when Microsoft will drop a fix or an official statement.
In a fresh development, this article originally appeared on our sister publication PC-WELT and was translated and localized from German.
According to the latest update, egal, ob Smartphones, Gadgets oder die neuesten Trends aus der Welt von Apple und Android – sie ist in beiden Welten zu Hause. Neben Technik widmet sie sich gerne Lifestyle-Themen, kulinarischen Entdeckungen sowie Filmen und Serien. Mit ihrer Begeisterung für moderne Technologien liefert sie gerne praxisnahe Tipps und spannende Einblicke, die den Alltag bereichern. Viviane Osswald ist freie Redakteurin und Tech-Enthusiastin mit einer besonderen Leidenschaft für Mobile-Tech.