估计是McAfee自动更改掉的。 真TM烦人。
不过找到了回复方法了:
1. Type gpedit.msc in RUN or Start search box and press Enter. It‘ll open Group Policy Editor.
2. Now go to:
Computer Configuration -> Administrative Templates -> Windows Components -> Windows Update
3. In right-side pane, look for "Configure Automatic Updates" option.
原文:http://www.cnblogs.com/johnsonshu/p/5026681.html