>Can someone tell me the difference when we go in Windows update to change the settings and we see sometimes a red warning and sometimes a yellow shield? This is under Windows Server 2003.

With servers the most common setting is to notify when updates are available but not install them automatically, as opposed to workstations where automatic installation is the norm.

In that context a yellow shield usually means updates are available but not yet installed.

A red shield may have several causes:

- Errors or failures with one or more previously installed updates
- Inability to contact MS's update servers to check for updates e.g. Internet connection failure
- A problem with Windows Update itself

For details you can look at the Installed Updates history and the Windows System Event log.