This error may appear anytime a Windows Update fails. To investigate possible solutions, we need to start with the specific error code. We can do this by viewing your update history. Swipe in from the right edge of the screen (or, if you're using a mouse, pointing to the lower-right corner of the screen and moving the mouse pointer up), and tap or click Settings . Tap or click Change PC settings , and then Update and recovery . Tap or click View your update history . View failed update error code. Please post here with your error code, so that the Community can try to help guide you appropriately.

Please cancel this enquiry as everything is 'sorted' Thanks G M Coldham

Over the last few days, since 1-05-2018 my computer has tried and failed to complete this update Last failed install attempt on ‎1/‎7/‎2018 - 0x800f0845 The update is called: 2018-01 Cumulative update for Windows 10 version x64 for x-64 based Systems (KB4056892) (5). It fails to install at 30% installed, after downloading apparently OK, when my computer suddenly shuts down and reboots, it is then locked with the Windows blue 'window' in the middle of the screen, (forever). I can fix it by rebooting, twice. The first time it comes up and locks with the same blue window as before, on the second reboot it says it is going to try repairs on the update. This goes on for a while and then it gives up and says it's going to undo the update. I can eventually reboot the computer once more and use it. Happens every time this updates tries to install. Help, what should I do to fix this??? Thank you.

I have the same update code except it has repeatedly installed successfully. I am assuming this is a mistake as one would assume if an update is successfully installed it should not install the same update again.

You could make 1 more specific thread for error 0xc000021a when installing KB2919355 and its subfiles, specially the KB 2934018

I had posted previously on the epic 103-page forum which spawned this thread after the original was frozen. The main open point which I don't want to get lost is as follows. I decided to try the the 13 May version of KB2919355, after I installed all the other fresh updates, but it still fails as before with 'Failed to configure Windows updates' when it reaches 100% after the second reboot and then spends forever rolling back again. I am not particularly surprised, given the earlier diagnosis [from the MS tech assigned to my support case, thanks to Susan Bradley] of a corrupted component store . So my principal hope remains with [his recommendation of] a non-destructive restore from Windows 8.1 Pro ISO when I get back home in five weeks; but I have yet to understand how I can access such an ISO without the absurd step of paying for a retail product key to fix my already legitimately-owned software (which was bought direct from MS)! Is the fact of my Microsoft Surface Pro OEM set-up being broken after the original in-place 8.1 upgrade and failed KB2919355 update not sufficient justification for providing me a copy of the required ISO as the evidently best-available solution to mend my W8.1 installation without the insulting suggested alternative of refreshing back to W8.0? Does MS have any idea of the cost of my time compared to the actual cost of the retail key?!? I am not implying that I should just buy one and be damned, I am saying that not providing the ISO to get this fixed in the quickest most convenient way for me is a commercially suicidal position for Microsoft! I am waiting for a convincing response. Trivially by comparison (but you never know what might prove to be significant), the exact error message quoted above 'Failed to configure Windows updates' is subtly different from the 'We couldn’t complete the updates ...' variation that you and a few others have described. Are there in fact two slightly different outcomes? Of course no error code is reported in these circumstances as the next thing it does after undoing is to reboot to the usual log-in screen as if nothing has happened and Windows Update itself has lost all its history since my earlier attempts at installing this so I can't see an error code there either.

Error: We couldn’t complete the updates, Undoing changes. Don’t turn off your computer.

Anonymous

This error may appear anytime a Windows Update fails. To investigate possible solutions, we need to start with the specific error code.

We can do this by viewing your update history.

Swipe in from the right edge of the screen (or, if you're using a mouse, pointing to the lower-right corner of the screen and moving the mouse pointer up), and tap or click Settings.
Tap or click Change PC settings, and then Update and recovery.
Tap or click View your update history.

View failed update error code.

Please post here with your error code, so that the Community can try to help guide you appropriately.

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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998 answers

Anonymous

2018-03-19T08:34:29+00:00

Please cancel this enquiry as everything is 'sorted'

Thanks

G M Coldham
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Anonymous

2018-01-08T00:31:52+00:00

Over the last few days, since 1-05-2018 my computer has tried and failed to complete this update

Last failed install attempt on ‎1/‎7/‎2018 - 0x800f0845

The update is called: 2018-01 Cumulative update for Windows 10 version x64 for x-64 based Systems

(KB4056892) (5).

It fails to install at 30% installed, after downloading apparently OK, when my computer suddenly shuts down and reboots, it is then locked with the Windows blue 'window' in the middle of the screen, (forever). I can fix it by rebooting, twice. The first time it comes up and locks with the same blue window as before, on the second reboot it says it is going to try repairs on the update. This goes on for a while and then it gives up and says it's going to undo the update. I can eventually reboot the computer once more and use it. Happens every time this updates tries to install.

Help, what should I do to fix this???

Thank you.
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Anonymous

2017-10-23T14:13:17+00:00

I have the same update code except it has repeatedly installed successfully. I am assuming this is a mistake as one would assume if an update is successfully installed it should not install the same update again.
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Anonymous

2014-05-15T13:38:43+00:00

You could make 1 more specific thread for error 0xc000021a when installing KB2919355 and its subfiles, specially the KB 2934018
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Anonymous

2014-05-15T12:52:48+00:00

I had posted previously on the epic 103-page forum which spawned this thread after the original was frozen. The main open point which I don't want to get lost is as follows.

I decided to try the the 13 May version of KB2919355, after I installed all the other fresh updates, but it still fails as before with 'Failed to configure Windows updates' when it reaches 100% after the second reboot and then spends forever rolling back again. I am not particularly surprised, given the earlier diagnosis [from the MS tech assigned to my support case, thanks to Susan Bradley] of a corrupted component store. So my principal hope remains with [his recommendation of] a non-destructive restore from Windows 8.1 Pro ISO when I get back home in five weeks; but I have yet to understand how I can access such an ISO without the absurd step of paying for a retail product key to fix my already legitimately-owned software (which was bought direct from MS)!

Is the fact of my Microsoft Surface Pro OEM set-up being broken after the original in-place 8.1 upgrade and failed KB2919355 update not sufficient justification for providing me a copy of the required ISO as the evidently best-available solution to mend my W8.1 installation without the insulting suggested alternative of refreshing back to W8.0? Does MS have any idea of the cost of my time compared to the actual cost of the retail key?!? I am not implying that I should just buy one and be damned, I am saying that not providing the ISO to get this fixed in the quickest most convenient way for me is a commercially suicidal position for Microsoft!

I am waiting for a convincing response.

Trivially by comparison (but you never know what might prove to be significant), the exact error message quoted above 'Failed to configure Windows updates' is subtly different from the 'We couldn’t complete the updates ...' variation that you and a few others have described. Are there in fact two slightly different outcomes? Of course no error code is reported in these circumstances as the next thing it does after undoing is to reboot to the usual log-in screen as if nothing has happened and Windows Update itself has lost all its history since my earlier attempts at installing this so I can't see an error code there either.
Was this answer helpful?

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