Microsoft has acknowledged two issues affecting certain installations of Windows 11: a critical bug causing system crashes for users with specific GPU configurations and a bug impacting WPA3 Wi-Fi connectivity. The first issue leads to a Black Screen of Death (BSOD) with the error code KERNELSECURITYCHECKFAILURE, which has been reported more frequently following recent updates. This error is linked to certain GPU setups encountering a system error involving dxgmms2.sys, a component of DirectX. Microsoft has released the February 2026 Update to address the GPU-related BSOD bug. The second issue prevents some PCs from connecting to WPA3-based Wi-Fi networks, which is related to an optional update released in January 2026 (KB5074105). The February 2026 Update also includes a fix for this connectivity problem, but the rollout is gradual, meaning users may still face issues until fully implemented.