Microsoft has acknowledged two distinct issues impacting certain installations of Windows 11, including a critical bug that leads to system crashes for users with specific GPU configurations. Notably, this problem is not limited to Nvidia GPUs, as the company has refrained from singling out any particular manufacturer. Additionally, Microsoft has confirmed the existence of another bug affecting WPA3 Wi-Fi connectivity.
The first issue involves a bug that triggers a Black Screen of Death (BSOD) on affected PCs, displaying the error code KERNELSECURITYCHECKFAILURE. This particular kernel security error is not entirely new; reports have surfaced since 2023, accompanied by a comprehensive support document detailing its causes. However, following recent Windows updates, an uptick in user reports regarding the KERNELSECURITYCHECKFAILURE error has been observed, with some users even encountering a green screen instead of the traditional black. This change aligns with Microsoft’s modernization efforts for Windows 11, which recently transitioned the BSOD from blue to black.
For instance, a user on the Feedback Hub shared their experience of encountering the BSOD error while attempting to play Genshin Impact when kernel-mode hardware-enforced stack protection is enabled. Similar discussions have emerged on platforms like Reddit, highlighting the widespread nature of the issue.
Fortunately, Microsoft has addressed these concerns with the release of the February 2026 Update for Windows 11. In the update’s release notes, the company quietly confirmed its awareness of the GPU-related BSOD bug and announced the rollout of a fix: “[Graphics] Fixed: This update addresses an issue where certain GPU configurations might recently have experienced a system error related to dxgmms2.sys, resulting in the KERNELSECURITYCHECK_FAILURE error.”
This update indicates that certain GPU setups may encounter a system error involving dxgmms2.sys, a vital component of DirectX responsible for graphics memory management. When this error occurs, Windows may halt operations with the KERNELSECURITYCHECK_FAILURE (Bug Check 0x139), a protective measure taken when the kernel detects corruption or invalid alterations in critical internal data structures.
Post-update, users should expect a resolution to the BSOD incidents linked to their GPU configurations.
Microsoft confirms Wi-Fi issues on Windows 11
In a separate support document, Microsoft has also acknowledged a bug within Windows 11 that hinders some PCs from connecting to WPA3-based Wi-Fi networks. The company asserts that this issue affects only specific networks, although it has not provided a definitive list of those impacted. This connectivity problem traces back to the optional update released in January 2026 (KB5074105).
Microsoft’s updated release notes state: “[Networking] Fixed: This update addresses an issue that prevented some devices from connecting to certain WPA3-Personal Wi-Fi networks. The issue might occur after you install KB5074105.” The company has indicated that these issues have been resolved in the February 2026 Update for Windows 11, but it is crucial to note that the fixes are being rolled out gradually. Consequently, even after installing the patch, users may still experience connectivity problems until the resolution is fully implemented across their systems.
