这两天遇到Windows 10的更新问题，官方有一个小工具，可以用来修复Windows Update的问题，备忘如下
https://support.microsoft.com/en-us/kb/971058
To automatically reset Windows Update components, run the appropriate Windows Update diagnostic, and then follow the on-screen instruction.
Windows 10
Click this link to download and run the Windows Update Troubleshooter.