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.

and when I tried the DISM solution, I got Error 87

Error 87 Means you made a typo.

No, that is incorrect. I tried it several times and I am capable of typing a few letters and a slash.

and when I tried to run these commands: Dism /online /cleanup-image /scanhealth and Dism /online /cleanup-image /restorehealth from an Admin prompt. I got a message saying each of them was "unknown"and again referring to error 87. I did not make a typo

did not make a typo OK. That is just the most likely reason. Another one is that the version of dism changed after KB2919355 so if you are using an old version it might be able to try to interpret a command line but do nothing else. In fact, in one incident I helped someone on it looked as if there was a mixup between the 32- and 64-bit versions. You could try doing the PowerShell pipeline I suggested then for clues on that tack... http://answers.microsoft.com/en-us/windows/forum/windows8_1-windows_update/issue-with-installing-updates-on-windows-81/24b91da6-fdbe-42dd-96c6-3cc91062054b?page=3 In fact, now I would suggest a simpler, more informative, pipeline: PS C:\Windows> **LS -Re -Fi dism.exe sort LastWriteTime ft Length, FullName -AutoSize** FYI Robert

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

2015-02-16T00:52:34+00:00

and when I tried the DISM solution, I got Error 87
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Anonymous

2015-02-16T01:04:17+00:00

Error 87

Means you made a typo.
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Anonymous

2015-02-16T01:23:09+00:00

No, that is incorrect. I tried it several times and I am capable of typing a few letters and a slash.
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Anonymous

2015-02-16T01:33:14+00:00

and when I tried to run these commands:

Dism /online /cleanup-image /scanhealth and Dism /online /cleanup-image /restorehealth from an Admin prompt.

I got a message saying each of them was "unknown"and again referring to error 87. I did not make a typo
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Anonymous

2015-02-16T06:05:05+00:00

did not make a typo

OK. That is just the most likely reason. Another one is that the version of dism changed after KB2919355 so if you are using an old version it might be able to try to interpret a command line but do nothing else. In fact, in one incident I helped someone on it looked as if there was a mixup between the 32- and 64-bit versions.

You could try doing the PowerShell pipeline I suggested then for clues on that tack...

http://answers.microsoft.com/en-us/windows/forum/windows8_1-windows_update/issue-with-installing-updates-on-windows-81/24b91da6-fdbe-42dd-96c6-3cc91062054b?page=3

In fact, now I would suggest a simpler, more informative, pipeline:

PS C:\Windows> **LS -Re -Fi dism.exe sort LastWriteTime ft Length, FullName -AutoSize**

FYI

Robert
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