我刚刚安装了 Windows 8.1。不幸的是，我还运行了自动更新，结果一切都搞砸了，无限重启循环：
We couldn't complete the updates. Undoing changes. Don't turn off your computer.
微软显然没有解决方案。也许有人已经这样做了？我尝试重新启动进入安全模式，以便手动卸载那里的更新：
http://denvycom.com/blog/windows-8-1-how-to-fix-updates-failed-undoing-changes-issue/
但我明白：
An error has occurred. Not all updates were uninstalled.