Windows Update 自动更新 设定 被锁（变灰）

估计是McAfee自动更改掉的。 真TM烦人。

方法 1

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.

方法 2

1) Hold WindowsKey + R 
    (is hold Start & press R on your keyboard)

2) Type: “regedit”
Hit Enter

3) Go to:
HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindowsWindowsUpdateAU

Find AUOptions. 
Double Click AUOptions or Right Click Modify

> You can change the values data from 1 through 5 <

1. Download updates but let me choose wether to install them
2. Check for updates but let me choose wether to download and install them
3. Download updates but let me choose wether to install them
4. Install updates automatically / Never Check For Updates
5. Enable the option box to choose manually