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.

I took a look at my partitions and as my laptop originally had just a 120gig SSD, the system reserved partition was less than 2 gigs. On the hunch that this might be causing the problem, I used the recommended Minitool partition wizard to extend the system reserved partition to about 25 gigs. I ran KB2919355 again, but the result was exactly the same. It seemed to install just fine within Windows and then failed after a series of reboots with the same "We couldn't complete the updates. Undoing Changes" message. It does not look like the reserve partition size made any difference, my problem is the same as before and this update will not install.

By comparing the Update History and the updates needing to be applied, I've found that they are the same. Update History indicates all were successfully installed. Therefore repeating the process results in an error. It appears that the auto updater doesn't get the message that they are installed. Maybe that's the problem and is fixable.

Robert, that's an issue in itself too. Windows update is set to automatically downloading and installing KB2919355. I am pretty sure that files were downloaded each time. So actually over this period, the auto-update had tried installing this many times. (Other updates were okay). I asked the same question earlier, and downloaded KB2919355 manually install it too. At the end of the installation (after a good 10+mins), it said failed too..... let me know any options that I should try...

The error code I get is 80246007.

I am pretty sure that files were downloaded each time. Unless the content is changing on the host that seems absurd, especially for the big downloads. However, for all I know this particular code might be pretty innocuous. E.g. it could be WU saying "That's all for today." or some such. What is a "DM" anyway? Perhaps there is a clue back in the other codes for the same group... Indeed: "Download manager errors". So it might also be a communication error or a symptom of cache corruption, etc. Probably would be a good idea to do what Marek suggested in his postscript... http://answers.microsoft.com/en-us/windows/forum/windows8_1-windows_install/kb2919355-windows-81-update-fails-800f0092-and/4d4d23a3-695a-4bd4-b340-d2ce9c75919d?page=40 (bottom of page, Re: SoftwareDistribution folder )

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.

0 comments

998 answers

Anonymous

2014-05-16T23:36:50+00:00

I took a look at my partitions and as my laptop originally had just a 120gig SSD, the system reserved partition was less than 2 gigs. On the hunch that this might be causing the problem, I used the recommended Minitool partition wizard to extend the system reserved partition to about 25 gigs. I ran KB2919355 again, but the result was exactly the same. It seemed to install just fine within Windows and then failed after a series of reboots with the same "We couldn't complete the updates. Undoing Changes" message.

It does not look like the reserve partition size made any difference, my problem is the same as before and this update will not install.
Was this answer helpful?

2 people found this answer helpful.

0 comments No comments
Anonymous

2014-05-17T00:03:12+00:00

By comparing the Update History and the updates needing to be applied, I've found that they are the same. Update History indicates all were successfully installed.

Therefore repeating the process results in an error.

It appears that the auto updater doesn't get the message that they are installed. Maybe that's the problem and is fixable.
Was this answer helpful?

2 people found this answer helpful.

0 comments No comments
Anonymous

2014-05-17T01:30:11+00:00

Robert, that's an issue in itself too. Windows update is set to automatically downloading and installing KB2919355. I am pretty sure that files were downloaded each time. So actually over this period, the auto-update had tried installing this many times. (Other updates were okay). I asked the same question earlier, and downloaded KB2919355 manually install it too. At the end of the installation (after a good 10+mins), it said failed too..... let me know any options that I should try...
Was this answer helpful?

2 people found this answer helpful.

0 comments No comments
Anonymous

2014-05-17T01:53:33+00:00

The error code I get is 80246007.
Was this answer helpful?

2 people found this answer helpful.

0 comments No comments
Anonymous

2014-05-17T02:27:43+00:00

I am pretty sure that files were downloaded each time.

Unless the content is changing on the host that seems absurd, especially for the big downloads.

However, for all I know this particular code might be pretty innocuous. E.g. it could be WU saying "That's all for today." or some such. What is a "DM" anyway? Perhaps there is a clue back in the other codes for the same group... Indeed: "Download manager errors". So it might also be a communication error or a symptom of cache corruption, etc. Probably would be a good idea to do what Marek suggested in his postscript...

http://answers.microsoft.com/en-us/windows/forum/windows8_1-windows_install/kb2919355-windows-81-update-fails-800f0092-and/4d4d23a3-695a-4bd4-b340-d2ce9c75919d?page=40

(bottom of page, Re: SoftwareDistribution folder )
Was this answer helpful?

2 people found this answer helpful.

0 comments No comments