Turn automatic updating on or off in windows

1. To have Windows install important updates as they become available, turn on automatic updating.
   Important updates provide significant benefits, such as improved security and reliability. You can also set Windows to automatically install recommended updates, which can address non-critical problems and help enhance your computing experience. Optional updates are not downloaded or installed automatically. To learn more about the types of updates that Microsoft publishes, see this Knowledge Base article on the Microsoft Help and Support website.
   Open Windows Update by clicking the Start button , clicking All Programs, and then clicking Windows Update.
2. In the left pane, click Change settings.
3. Choose the option that you want.
4. Under Recommended updates, select the Include recommended updates when downloading, installing, or notifying me about updates check box, and then click OK.  If you are prompted for an administrator password or confirmation, type the password or provide confirmation.