Windows update failure 0x800f0831

Pragmatically preforming the in-place upgrade repair is the quickest way forward. There are a few threads where- after many posts and some days and analysis of update logs- a solution has been found.

This requires a lot of time on the part of the person helping, and yours of course, with no certainty as to the outcome.

The quicker resolution is the in-place upgrade repair.

Hello @acrusco,

These sort of problems can take MANY hours of time and effort and still end up unresolved. Performing an In-Place-Upgrade - Repair Install is a Non-Destructive Process. If the problem still exists afterwards, it narrows down what the possible problem could be . . .

 In-Place-Upgrade - Repair Install

Information & Tutorials:

This is a Non-Destructive Process which keeps ALL your Apps, Programs, and Personal Data etc Intact . . .

IMPORTANT: This is an extract from the Tutorial below . . .

• You will only be able to do a repair install of Windows 10 from within Windows 10. You will not be able to do a repair install at boot or in Safe Mode.
  
• You will need at least around 10 GB + what Windows is currently using of free space available on the Windows drive.
• The installation media (ex: ISO or USB) must be the same edition and same or newer build as your currently installed Windows 10. If it's not, then the repair install will fail.
• The installation media (ex: ISO or USB) must be the same base language (aka: system default language) as your currently installed Windows 10. If it's not, then you will not keep anything.
• If you have a 32-bit Windows 10, then you must use a 32-bit ISO or USB.
• If you have a 64-bit Windows 10, then you must use a 64-bit ISO or USB.

> How to Do a Repair Install of Windows 10 with an In-Place Upgrade

Basically . . .

[1] Download the ISO to the Desktop.
[2] Right-click the ISO > Mount.
[3] Open File Explorer.
[4] Double-click the Mounted Drive to open it.
[5] Double-click setup.exe.
[6] Choose the Upgrade option.
[7] Select Change what to keep.
[8] Select One of the following . . .

• Keep Personal Files and Apps.
• Keep Personal Files Only.
• Nothing.

[9] Unmount the ISO by right-clicking the Mounted Drive > Eject.

The only downside is that you could POSSIBLY lose some of your personalizations.

Recommendations:

DISABLE:

ANY Non-Microsoft . . .

• Antivirus Software.
• Firewall software.
• Drive Encryption Software.

Temporarily Disable Secure Boot before performing the In-Place-Upgrade - Repair Install to be on the safe side.

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I hope this helps.

One final thought- have you perhaps uninstalled or removed Edge?