
When Updates are installed but reboot is not triggered. When Updates are downloaded but installation is not triggered. When you see that the updates are available but download is not getting triggered.

Starting Windows 10, the Update Orchestrator is responsible for sequence of downloading and installing various update types from Windows Update. If you receive an error message when you run Windows Update, you can use the information that is included in the Windowsupdate.log log file to troubleshoot the issue.

Starting in Windows 8.1 and continuing in Windows 10, Windows Update client uses Event Tracing for Windows (ETW) to generate diagnostic logs.

The following table describes the log files created by Windows Update.
