From the Help & Support center
Configure the Automatic Updates Feature
To configure the Automatic Updates feature:
1.. Right-click My Computer, and then click Properties.
2.. Click the Automatic Updates tab, and then click Notify me before
downloading any updates and notify me again before installing them on my
computer.
When you configure this setting, Automatic Updates checks the Windows Update
site periodically for critical updates while the computer is connected to
the Internet but the connection to the Internet is not being used.
After Automatic Updates has compiled a list of available updates, a list of
updates is displayed. Click any updates that you want to download. Automatic
Updates downloads only the updates that you selected. When the download is
complete, you are prompted to install the updates. Some updates require that
you restart the computer after you install these updates.
NOTE: If you do not select updates from the list, these updates are not
displayed in any lists that Automatic Updates generates in the future. To
unhide these updates, click Restore Hidden Items on the Automatic Updates
tab.
