Serious Discussion How Windows Updates works in Windows 11 [Details in Link]

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The Windows Update workflow has four core areas of functionality:

• Scan
  
  • Orchestrator schedules the scan.
  • Orchestrator verifies admin approvals and policies for download.
• Download
  
  • Orchestrator starts downloads.
  • Windows Update downloads manifest files and provides them to the arbiter.
  • The arbiter evaluates the manifest and tells the Windows Update client to download files.
  • Windows Update client downloads files in a temporary folder.
  • The arbiter stages the downloaded files.
• Install
  
  • Orchestrator starts the installation.
  • The arbiter calls the installer to install the package.
• Commit
  
  • Orchestrator starts a restart.
  • The arbiter finalizes before the restart.

Learn more:

How Windows Update works - Windows Client

Learn about the process Windows Update uses to download and install updates on a Windows client device.

docs.microsoft.com