Windows 自动更新 设定 被锁（变灰）

估计是McAfee自动更改掉的。 真TM烦人。

不过找到了回复方法了：

http://www.askvg.com/how-to-change-windows-update-settings-when-managed-or-disabled-by-system-administrator/

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