If you during the installation of a Cumulative Update you encounter error 0x800f0831 on a Windows Server or on a Windows 11/10 client, then this post is intended to help you. In this guide, we will identify the potential causes of this error as well as provide the solutions you can try to help you redress this issue.

1] Run Windows Update Troubleshooter

2] Manually install the Feature or Cumulative update

3] Uninstall the VPN client or remove the Proxy server (if applicable)

4] Set the status of Windows Update to Automatic

5] Enable .NET Framework 3.5

6] Install .NET Framework 3.5 via Command Prompt

7] Run SFC & DISM scans

8] Perform System Restore

9] Perform a Fresh Start, In-place upgrade repair or clean install

Timecodes:
0:00 Intro
0:27 Run the Windows Update troubleshooter
0:48 Manually install update
1:07 Uninstall VPN and remove proxy
1:41 Run and SFC Scan
2:04 Perform a System Restore

Learn more on https://www.thewindowsclub.com/windows-10-update-error-0x800f0831

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