Windows 11 Update Causes Issues for HP and Lenovo

Microsoft's update KB5121003, released in August 2026, has proven problematic for users of Windows 11. Laptops from HP and Lenovo are particularly affected, experiencing significant stability issues since the installation of the update. Users report crashes, printer malfunctions, and problems with applications such as Teams and Outlook, especially on ARM PCs. The update has led to installation issues on HP laptops. Users in the Microsoft support forum have confirmed that HP support attributes BIOS damage to the update.

One affected user recounted that they were forced to reset their BIOS in order to attempt the installation of the update again. Lenovo users report another issue caused by the update: the power supply is randomly interrupted. This poses a significant inconvenience, especially for users who need to charge their devices. So far, neither Lenovo nor Microsoft has responded to or officially acknowledged these issues. The problems with update KB5121003 are not new.

Shortly after its release, users reported crashes and other malfunctions. However, Microsoft has yet to provide a comprehensive solution for the issues that have arisen. Instead, it is recommended to roll back the update to restore system stability. Some users have found that reverting update KB5121003 resolves the issues. Microsoft offers guidance on the Known Issue Rollback (KIR) to remove already installed updates.

This method could serve as a temporary solution for many users until Microsoft provides a fixed update. The impact of the update is not limited to HP and Lenovo. Other manufacturers have also reported similar issues caused by the update. This could indicate a broader problem within the update that may also affect other devices. Users are increasingly frustrated with the lack of communication from Microsoft and the affected manufacturers.

Many are calling for a quicker response and solutions to the issues that have arisen. The uncertainty regarding the stability of their devices is leading to a loss of trust in Microsoft's software updates. Microsoft has announced that it is working on a solution for the problems; however, there is currently no specific timeline for the release of a new update. Users are advised to regularly check their systems and stay alert for official communications from Microsoft. Update KB5121003 is part of the regular Patch Tuesday rollouts that Microsoft conducts every month.

These updates are intended to close security vulnerabilities and improve system performance. However, the issues caused by this particular update raise questions about quality assurance and testing procedures at Microsoft. Windows 11 users should be aware that the problems with update KB5121003 may also affect their systems. A proactive review of installed updates and following the rollback instructions could help ensure device stability. Microsoft plans to review the update for all users by the end of September 2026 and revise it if necessary.