Has your computer stopped working out of nowhere or gotten stuck on a black screen? Recently, several users reported a serious Windows 11 bug that is preventing the installation of new security packages.
In this article, you will understand the causes of these technical failures and how to regain control of your machine. Additionally, we will show which specific versions are presenting critical stability issues at this time.
Understand the cause of the Windows 11 bug and recent failures
Microsoft confirmed that a serious failure began to appear shortly after the release of the January 2026 updates. This technical problem mainly affects versions 24H2 and 25H2 of the operating system. As a result, many users are unable to apply new security updates necessary for the PC.
According to technical reports, the error is directly linked to the KB5074109 package. This patch was supposed to fix vulnerabilities but ended up generating unexpected conflicts on several machines. Therefore, the system enters an error state even before completing the installation process.
The impact of the KB5074109 package on the system
This specific package is the main villain for those using Microsoft’s most recent builds. In addition to blocking the flow of new improvements, it causes instability in native applications, such as Outlook. Thus, the workflow of many professional gamers and editors has been completely interrupted.
Another important point involves the activation of the Secure Boot feature. On computers where this function is enabled, the Windows 11 bug manifests more aggressively. On the other hand, machines with older configurations seem to face extreme slowness issues during boot.
Common symptoms caused by the bug and updates
Reports indicate that the most frequent symptom is the famous black screen of death. In this scenario, the computer displays a generic error message and requests an immediate restart. However, the system enters an infinite cycle of failures and never reaches the desktop.
Additionally, the Windows 11 bug has disproportionately affected the Samsung Galaxy Book4 laptop line. Users of these devices report that the system’s main directory becomes inaccessible. Consequently, important files and programs installed on the C drive become completely blocked for use.
Reboot cycles and the black screen of death
The reboot cycle occurs because Windows tries to apply the patch and fails successively. Every time the user tries to turn on the PC, the error message reappears. Unfortunately, this behavior renders the device unusable until a manual intervention is performed by the owner.
Some users also face a curious problem where the PC restarts instead of shutting down. This happens due to the KB5073455 package, which confuses the orders sent by the Start Menu. Below, we list the main symptoms identified by the technical community:
- Complete block of access to the C drive.
- Black screen with error message right after login.
- Failure to enter hibernation or sleep mode.
- Forced restart when trying to shut down the computer.
- Microsoft 365 and Copilot applications stopping working.
How to resolve the Windows 11 bug and stuck updates
For those suffering from this problem, the immediate solution may involve manually uninstalling the packages. If you can access the system, you should navigate to the Windows Update history. There, it is possible to remove the KB5074109 update to restore your machine’s momentary stability.
However, if your PC no longer starts, the procedure requires the use of external recovery media. Microsoft recommends that users create a bootable USB drive on another healthy computer. This way, it is possible to try to repair the system files damaged by the Windows 11 bug without losing personal data.
Procedures to regain access to the system
If your Windows still allows basic access, there are simple steps that can help. Often, third-party security software conflicts with new updates. Therefore, temporarily disabling the antivirus may allow the installation process to finish correctly.
- Select the Start button and go to System Settings.
- Access the Windows Update section and click on Update history.
- Choose the Uninstall Updates option at the bottom of the page.
- Locate the problematic package (such as KB5074109) and click Uninstall.
- Restart the computer and check if the boot error has disappeared.
What to do if the Windows 11 bug persists on your PC
In cases where none of the above solutions work, a clean reinstall may be the only way. This occurs when file corruption reaches the hard drive’s boot table. Unfortunately, the Windows 11 bug has proven to be quite resilient on certain specific Samsung hardware configurations.
Currently, Microsoft and hardware partners are working on a definitive hotfix for the problem. While this official fix does not arrive, the recommendation for IT administrators is to pause new updates. This prevents more machines from collapsing within corporate or home environments.
At this moment, patience is the best tool for the user affected by the bug. Constantly check official support channels to download automated fix tools. Therefore, keep your backups up to date to avoid permanent file loss in case a new Windows 11 bug occurs.
