We couldn't complete the updates Undoing changes; don't turn off your computer

How can I fix it?

RajithR, what say you to this problem, cant find the corrupted updates, fix 'em, release the fix so the users of Win/ 8.1 do not have to suffer!!!!

Windows Update Error "We Couldn't Complete the Updates. Undoing Changes” Still Not Fixed

Some users are still having issues installing updates

Several Patch Tuesday updates that Microsoft released in the last few months are doing more harm than good, and living proof is the huge number of complaints posted by users online.

One of the issues that still exist on many Windows computers causes updates to fail to install, and what’s worse, it turns out that quite a lot of PCs are impacted these days despite the fact that the first reports on the matter reached the web in May 2014.

Users who turned to Microsoft’s Community forums claim that Windows update installation fails with an error saying that “We couldn’t complete the updates, Undoing changes. Don’t turn off your computer,” and no matter the workaround they try, nothing helps to update their PCs.

Basically, this means that some systems haven’t received updates since May 2014, while some users reveal that the issue only appeared recently, after Microsoft released its Patch Tuesday fixes.

Reinstall Windows 8.1?

Undoubtedly, users who got themselves stuck with this error turned to all kinds of workarounds, but those who wanted to let Microsoft fix it contacted technical support for professional guidance.

And surprise, surprise, some say that Microsoft staff detected some corrupted Windows update files on the affected machines and recommended users to install Windows 8.1 from scratch.

“The issue was raised to 2nd level support who quickly judged that there must be a corrupted file either on the original installation or one of the earlier updates. He concluded that the only answer was to reinstall 8.1, which apparently only for this operating system, can be achieved without affecting either existing applications or data. He did this remotely and it took a couple of hours. After restart, magically, all the updates are in, no problem and the system is working fine,” one user explains.

Basically, refreshing Windows 8.1 does solve the problem, but there’s no doubt that some don’t want to go this far to fix an issue that Microsoft’s updates caused in the first place.

In the meantime, no other fully working solution exists, so the only option is to wait a little bit longer to see if the company finds a way to address the bug.

 Source: http://news.softpedia.com/news/Windows-Update-Error-We-Couldn-t-Complete-the-Updates-Undoing-Changes-Still-Not-Fixed-484114.shtml

Unable to complete update 

Since several people suggest reinstall Windows 8.1, can MS help me do it remotely. This bug is driving me crazy and interrupts me while I'm trying to do some work.

Hi,

Do you remember which Windows Updates you were trying to install?

I would suggest you to refer to this article and perform the troubleshooting.

http://support.microsoft.com/kb/949358/en-us

Clean Boot: After troubleshooting in a Clean Boot state, make sure to place the computer back to Normal Startup Mode following the same link.

Let us know if it helps. If the issue persists, please reply, we will be glad to assist you further.

I had this problem with Windows 10. So I searched the net and found this that worked perfect :

The option to uninstall Windows Updates (not driver updates) is buried in the Settings app. Open Settings and navigate to Update & security > Windows Update > Advanced options > View your update history. You’ll see a link reading “Uninstall updates” at the top of the update history list.

(In the Windows Insider Preview, there was also a link here for uninstalling the latest build. If Microsoft rolls out a big update to Windows 10 as a “build” again, you might see a link right under “Uninstall updates” for rolling back to an earlier build.)

This link takes you to the “Uninstall an update” dialog, where you can uninstall an individual Windows Update if it’s causing problems on your system.

Hi,

Do you remember which Windows Updates you were trying to install?

I would suggest you to refer to this article and perform the troubleshooting.

http://support.microsoft.com/kb/949358/en-us

Clean Boot: After troubleshooting in a Clean Boot state, make sure to place the computer back to Normal Startup Mode following the same link.

Here's the link to the webpage that offered me a solution.

http://www.howtogeek.com/223864/how-to-uninstall-and-block-updates-and-drivers-on-windows-10/

Let us know if it helps. If the issue persists, please reply, we will be glad to assist you further.

I had this problem with Windows 10. So I searched the net and found this that worked perfect :

The option to uninstall Windows Updates (not driver updates) is buried in the Settings app. Open Settings and navigate to Update & security > Windows Update > Advanced options > View your update history. You’ll see a link reading “Uninstall updates” at the top of the update history list.

(In the Windows Insider Preview, there was also a link here for uninstalling the latest build. If Microsoft rolls out a big update to Windows 10 as a “build” again, you might see a link right under “Uninstall updates” for rolling back to an earlier build.)

This link takes you to the “Uninstall an update” dialog, where you can uninstall an individual Windows Update if it’s causing problems on your system.