微软确认，部分设备在安装2026年1月发布的累积更新KB5074109后出现无法正常启动的问题，表现为黑屏并显示错误代码“UNMOUNTABLE_BOOT_VOLUME”。经初步分析，该故障并非由KB5074109单独引发，而是源于此前系统状态的 ...

Out of all the Blue Screen errors, the worst one, in my opinion, would be the one where your computer cannot even boot properly. Because of this, even if you want to reinstall Windows, you cannot back ...