I am running Windows 10 Home 2004 (Build 19041.450). Windows Update notified me that there was a cumulative update available to install (2020-09 Cumulative Update for Windows 10 Version 2004 for x64-based Systems (KB4571756)). When I told it to install the update, it will download and go up to "Installing - 100%" and then just show this error: I've tried the following in an attempt to fix the error: Run "sfc /scannow" in an elevated command prompt Run "DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:<Source of clean Windows 10 2004 ISO created using Windows Media Creation Tool> /LimitAccess" in an elevated command prompt Uninstall and reinstall NET framework 3.5 from "Turn Windows features on or off" in Control Panel Manually download the specific update from the Microsoft Update Catalog and install it Stop the Windows Update service and delete the Windows Update cache located in "%SystemRoot%\SoftwareDistrubution", then restart the service Obviously, none of these worked so I'm looking for any other solutions to this problem. Any help is appreciated.

At the very beginning of a Windows 10 upgrade (running setup.exe to upgrade from a mounted ISO file) there is a link where you can select to install updates, or not, during the upgrade. This usually defaults to enabled. The end result is that doing an upgrade this way results in the most recent Cumulative Update being incorporated into the upgrade. Tomorrow there should be a new CU, which would normally be incorporated into such an upgrade, if you want to try that method. Also, there should soon be a public release of Windows 10 Version 20H2, which would add the 20H2 enablement package to the public ISO that we can download.

I reset my PC and did a clean install of Windows 10 using USB image. After going thru the entire install, before I did anything else I did the windows update. The same error is back and I am unable to get KB4571756 installed. Mani.

To do an in-place repair/upgrade, you do not need to create bootable media. But even if you do so, you should just run setup.exe from it, from within your running Windows, not boot the computer from it. Also, even if you did want to boot from USB install media, to do a clean install of Windows 10, the screen that asks for a Product Key says to select that you do not have a Product Key, if you are reinstalling Windows. You are to just skip past that page this way. Most Windows 10 devices have a digital license for that Edition of Windows 10. You cannot lose that without replacing major hardware components, such as the motherboard. Your device will be recognized as licensed when you bring Windows 10 online. You can repair your System files to regain a bootable system, but you should open a new Question thread to get help with this. Your existing Windows 10 install is probably fine.

After several frustrations I could not help it and went ahead with repair/reinstall or whatever... So I downloaded/created a USB install disk - for the purpose of repairing this damn update failure. Several minutes of DL, repair time, then POOF! Initial windows showing I need to enter Windows License... I was like WHAT? Why asking for Windows License? It should be automatic for the installer to recognize this machine! I went back to BIOS and noticed, no BOOT options (other than the USB)... It wont boot anymore! I dont have Windows License! NOTHING! Now I have a lost Windows License to add to the problem! @#$%#

Just tried that cleanup bat file and that also did not work. Still failing for me. 0x800f081f error. July install was that last one that worked. https://support.microsoft.com/en-us/help/4565503/windows-10-update-kb4565503 Installation Failure: Windows failed to install the following update with error 0x800F081F: 2020-09 Cumulative Update Preview for Windows 10 Version 20H2 for x64-based Systems (KB4577063). Log Name: System Source: Microsoft-Windows-WindowsUpdateClient Date: 10/4/2020 7:06:10 PM Event ID: 20 Task Category: Windows Update Agent Level: Error Keywords: Failure,Installation User: SYSTEM Computer: RyzenDell Description: Installation Failure: Windows failed to install the following update with error 0x800F081F: 2020-09 Cumulative Update Preview for Windows 10 Version 20H2 for x64-based Systems (KB4577063). Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="Microsoft-Windows-WindowsUpdateClient" Guid="{945a8954-c147-4acd-923f-40c45405a658}" /> <EventID>20</EventID> <Version>1</Version> <Level>2</Level> <Task>1</Task> <Opcode>13</Opcode> <Keywords>0x8000000000000028</Keywords> <TimeCreated SystemTime="2020-10-05T00:06:10.4460172Z" /> <EventRecordID>106961</EventRecordID> <Correlation /> <Execution ProcessID="7880" ThreadID="8588" /> <Channel>System</Channel> <Computer>RyzenDell</Computer> <Security UserID="S-1-5-18" /> </System> <EventData> <Data Name="errorCode">0x800f081f</Data> <Data Name="updateTitle">2020-09 Cumulative Update Preview for Windows 10 Version 20H2 for x64-based Systems (KB4577063)</Data> <Data Name="updateGuid">{65992966-2f46-4523-8564-371574af5f4e}</Data> <Data Name="updateRevisionNumber">1</Data> <Data Name="serviceGuid">{8b24b027-1dee-babb-9a95-3517dfb9c552}</Data> </EventData> </Event>

Cumulative update won't install (KB4571756) (Error 0x800f081f)

Anonymous

I am running Windows 10 Home 2004 (Build 19041.450). Windows Update notified me that there was a cumulative update available to install (2020-09 Cumulative Update for Windows 10 Version 2004 for x64-based Systems (KB4571756)). When I told it to install the update, it will download and go up to "Installing - 100%" and then just show this error:

I've tried the following in an attempt to fix the error:

Run "sfc /scannow" in an elevated command prompt
Run "DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:<Source of clean Windows 10 2004 ISO created using Windows Media Creation Tool> /LimitAccess" in an elevated command prompt
Uninstall and reinstall NET framework 3.5 from "Turn Windows features on or off" in Control Panel
Manually download the specific update from the Microsoft Update Catalog and install it
Stop the Windows Update service and delete the Windows Update cache located in "%SystemRoot%\SoftwareDistrubution", then restart the service

Obviously, none of these worked so I'm looking for any other solutions to this problem. Any help is appreciated.

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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217 answers

Anonymous

2020-10-05T18:38:19+00:00

At the very beginning of a Windows 10 upgrade (running setup.exe to upgrade from a mounted ISO file) there is a link where you can select to install updates, or not, during the upgrade. This usually defaults to enabled. The end result is that doing an upgrade this way results in the most recent Cumulative Update being incorporated into the upgrade.

Tomorrow there should be a new CU, which would normally be incorporated into such an upgrade, if you want to try that method.

Also, there should soon be a public release of Windows 10 Version 20H2, which would add the 20H2 enablement package to the public ISO that we can download.
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Anonymous

2020-10-05T17:55:03+00:00

I reset my PC and did a clean install of Windows 10 using USB image. After going thru the entire install, before I did anything else I did the windows update.

The same error is back and I am unable to get KB4571756 installed.

Mani.
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Anonymous

2020-10-05T14:31:13+00:00

To do an in-place repair/upgrade, you do not need to create bootable media. But even if you do so, you should just run setup.exe from it, from within your running Windows, not boot the computer from it.

Also, even if you did want to boot from USB install media, to do a clean install of Windows 10, the screen that asks for a Product Key says to select that you do not have a Product Key, if you are reinstalling Windows. You are to just skip past that page this way.

Most Windows 10 devices have a digital license for that Edition of Windows 10. You cannot lose that without replacing major hardware components, such as the motherboard. Your device will be recognized as licensed when you bring Windows 10 online.

You can repair your System files to regain a bootable system, but you should open a new Question thread to get help with this. Your existing Windows 10 install is probably fine.
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Anonymous

2020-10-05T13:42:24+00:00

After several frustrations I could not help it and went ahead with repair/reinstall or whatever...

So I downloaded/created a USB install disk - for the purpose of repairing this damn update failure.

Several minutes of DL, repair time, then POOF! Initial windows showing I need to enter Windows License...

I was like WHAT? Why asking for Windows License? It should be automatic for the installer to recognize this machine!

I went back to BIOS and noticed, no BOOT options (other than the USB)...

It wont boot anymore! I dont have Windows License! NOTHING!

Now I have a lost Windows License to add to the problem!

@#$%#
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Anonymous

2020-10-05T00:06:57+00:00

Just tried that cleanup bat file and that also did not work. Still failing for me.

0x800f081f error. July install was that last one that worked. https://support.microsoft.com/en-us/help/4565503/windows-10-update-kb4565503

Installation Failure: Windows failed to install the following update with error 0x800F081F: 2020-09 Cumulative Update Preview for Windows 10 Version 20H2 for x64-based Systems (KB4577063).

Log Name: System

Source: Microsoft-Windows-WindowsUpdateClient

Date: 10/4/2020 7:06:10 PM

Event ID: 20

Task Category: Windows Update Agent

Level: Error

Keywords: Failure,Installation

User: SYSTEM

Computer: RyzenDell

Description:

Installation Failure: Windows failed to install the following update with error 0x800F081F: 2020-09 Cumulative Update Preview for Windows 10 Version 20H2 for x64-based Systems (KB4577063).

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

<System>

<Provider Name="Microsoft-Windows-WindowsUpdateClient" Guid="{945a8954-c147-4acd-923f-40c45405a658}" />

<EventID>20</EventID>

<Version>1</Version>

<Level>2</Level>

<Task>1</Task>

<Opcode>13</Opcode>

<Keywords>0x8000000000000028</Keywords>

<TimeCreated SystemTime="2020-10-05T00:06:10.4460172Z" />

<EventRecordID>106961</EventRecordID>

<Correlation />

<Execution ProcessID="7880" ThreadID="8588" />

<Channel>System</Channel>

<Computer>RyzenDell</Computer>

<Security UserID="S-1-5-18" />

</System>

<EventData>

<Data Name="errorCode">0x800f081f</Data>

<Data Name="updateTitle">2020-09 Cumulative Update Preview for Windows 10 Version 20H2 for x64-based Systems (KB4577063)</Data>

<Data Name="updateGuid">{65992966-2f46-4523-8564-371574af5f4e}</Data>

<Data Name="updateRevisionNumber">1</Data>

<Data Name="serviceGuid">{8b24b027-1dee-babb-9a95-3517dfb9c552}</Data>

</EventData>

</Event>
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