微软为了安全，提高了安装msi 的权限？

星なる石

嘛……算了……

以下 为咱的暂时性的解决方案——

1. Run the following Microsoft fixit tools one after another, to ‘automatically diagnose and fix common problems with Windows Update'，reboot system。
2. Configure the computer to ‘clean boot’ state and then try installing the update and check if that helps。