After the download process has started, you can pause or resume downloading at any
time. If you close your Internet connection or restart your computer after pausing a
download process, Windows automatically resumes the download process the next
time you are connected to the Internet.
During the download process, click the icon that is displayed in the notification area,
and then click Pause.
When you are ready for Windows to start downloading again, click the Automatic
updating icon, and then click
Resume.
Restore an Update that You Previously Declined
If you decide not to download a specific update, you can prompt Windows Update to
offer that update again.
Click Start , click Control Panel, and then double-click System.
Click the Automatic Updates tab, and then click Restore Declined Updates.