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.

Using a downloaded ISO file should use much less bandwidth than repeatedly trying Windows Update: You only have to download the ISO once. You can use it like a Windows Upgrade, even if it is the same Winodws 10 version that you already have installed. Just mount the ISO file in Windows, which will create a new drive letter. Then run setup.exe from the new drive letter to repair or upgrade Windows. It preserves installed software and data files, just like upgrading via Windows Update. By default, this method will also add-in the latest Cumulative Update (unless you tell it not to). There should be a new CU available on October 13, 2020. You always have the option of backing everything up, creating USB bootable install media from the ISO file and then performing a clean install to a blank hard drive or SSD. But using an ISO file does not force you to do it that way.

My computer has tried running the update for a a couple of weeks now, and I still get the error as OP. I've tried all of the above, minus Installing from ISO. Id would prefer not to have to go that route as I don't have a constant connection to the internet and I don't like using bandwidth from my phone.

Oh okay that clears up a lot of things.

So if I'm not wrong the ISO only gets the patch files added IF run from setup.exe? NO the updates are stored in the windows install folder on your hard disk and added during setup. Only way for files, like updates, drivers etc is to slip stream them into the ISO image. Running setup from iso only extracts window files to a temp folder for installing, if I read correctly what you are referring to.

The ISO files are not changed each month to include the most recent Cumulative Update. Rather, we have the option to allow the ISO-based update to add the most recent CU during the upgrade or repair. By default it will add it in, unless you use the link from the first screen of Windows setup to disable any updates. Occasionally, the ISO offered does get a new CU added to it, but this seems to be pretty rare. Plus, even when this happens, a new CU will need to be installed within a month and each month thereafter. When Windows 10 version 20H2 becomes the public build, that ISO will have some CU included, but it may no longer be the most recent CU by the time the ISO is released to the public. I figured that would be the case as updating the iso's each month would be pointless, then we don't need windows update. I will just slip stream these updates, not a big deal and takes 20-30mins. Thanks again for your help and replies.

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

2020-10-11T03:34:10+00:00

Using a downloaded ISO file should use much less bandwidth than repeatedly trying Windows Update: You only have to download the ISO once. You can use it like a Windows Upgrade, even if it is the same Winodws 10 version that you already have installed. Just mount the ISO file in Windows, which will create a new drive letter. Then run setup.exe from the new drive letter to repair or upgrade Windows. It preserves installed software and data files, just like upgrading via Windows Update.

By default, this method will also add-in the latest Cumulative Update (unless you tell it not to). There should be a new CU available on October 13, 2020.

You always have the option of backing everything up, creating USB bootable install media from the ISO file and then performing a clean install to a blank hard drive or SSD. But using an ISO file does not force you to do it that way.
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Anonymous

2020-10-11T02:29:25+00:00

My computer has tried running the update for a a couple of weeks now, and I still get the error as OP. I've tried all of the above, minus Installing from ISO. Id would prefer not to have to go that route as I don't have a constant connection to the internet and I don't like using bandwidth from my phone.
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Anonymous

2020-10-06T08:32:41+00:00

Oh okay that clears up a lot of things.
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Anonymous

2020-10-06T08:27:14+00:00

So if I'm not wrong the ISO only gets the patch files added IF run from setup.exe?

NO the updates are stored in the windows install folder on your hard disk and added during setup. Only way for files, like updates, drivers etc is to slip stream them into the ISO image. Running setup from iso only extracts window files to a temp folder for installing, if I read correctly what you are referring to.
Was this answer helpful?

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Anonymous

2020-10-06T08:25:52+00:00

The ISO files are not changed each month to include the most recent Cumulative Update. Rather, we have the option to allow the ISO-based update to add the most recent CU during the upgrade or repair. By default it will add it in, unless you use the link from the first screen of Windows setup to disable any updates.

Occasionally, the ISO offered does get a new CU added to it, but this seems to be pretty rare. Plus, even when this happens, a new CU will need to be installed within a month and each month thereafter.

When Windows 10 version 20H2 becomes the public build, that ISO will have some CU included, but it may no longer be the most recent CU by the time the ISO is released to the public.

I figured that would be the case as updating the iso's each month would be pointless, then we don't need windows update. I will just slip stream these updates, not a big deal and takes 20-30mins. Thanks again for your help and replies.
Was this answer helpful?

0 comments No comments