system
5
Are you using a Proxy Server?
Also I don’t believe if you said how may times you got the error.
You may encounter temporary connection-related errors when you use Windows Update or Microsoft Update to install updates
When you use the Windows Update Web site or the Microsoft Update Web site to check for and install updates, you may receive one of the errors that are listed in the “Symptoms” section.
Important In most cases, these errors are caused by temporary issues caused by very slight interruptions in communications between the computer to be updated and the update to be downloaded. These issues are generally self-healing. So, before you try the troubleshooting methods in this article, try exiting the Windows Update site, waiting 10 to 15 minutes and start Windows Update again, and check for updates. You can also let Windows Automatic Update install the updates on its usual 24-hour cycle.
Note These errors can occur even if no changes have been made to network settings.
See link for more suggestions on how to resolve this issue.
http://support.microsoft.com/kb/836941