Windows 10 build 14977 fails to install on some Mobile devices

By: Ivan Jenic
2 minute read

Microsoft just released the new Preview build 14977 for Windows 10 Mobile. The build is currently only available for Mobile devices, so Insiders on PC will have to wait some more time to get the new build.

As always, Microsoft revealed the list of known issues that build 14977 causes. However, problems listed by Microsoft are not the only problems bothering Insiders. Microsoft’s Jason [MS] said on Microsoft’s forums that some Lumia devices are having problems downloading the new build.

“Hello Insiders,

While attempting to install build 14977 for Mobile, you may hit an error:  8007007B

Unfortunately if you hit this error, you will not be able to install 14977.  There is no workaround.  You’ll need to wait for our next Mobile build release.

This issue does not affect all devices and there is no long-term harm from encountering it.  The device will simply fail the install and boot back to your current OS build.

We’re already working on a resolution so all applicable devices may receive the next update.

Thank you as always,


Microsoft is currently investigating the issue and the solution should be released soon. This is, so far, the only problem caused by build 14977 we’ve managed to find. Despite that, users are generally unsatisfied. First, the build is late on PC and even Mobile Insiders are having troubles installing it.

As soon Microsoft releases a solution, we’ll let you know about it. Also, we’re going to write our traditional report article as soon as users report more problems.

Have you tried to install the build on your Windows 10 Mobile device yet? Or you’ve encountered some other problems? Let us know in the comments.


For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patended Technologies (requires upgrade).


Next up

Best Windows 10 antivirus software to use in 2018

By: Radu Tyrsina
7 minute read

Update – 2018 will soon come to an end and we already have a guide on what is the best antivirus you should get in […]

Continue Reading

These features are out for good with Windows 10 version 1809' By: Sovan Mandal
2 minute read

Microsoft is all set to launch its next big update, Windows 10 version 1809 in October. While that should be a nice piece of news […]

Continue Reading

Windows 10 18H2 builds no longer receive new features

By: Matthew Adams
3 minute read

The Windows 10 October 2018 Update (otherwise 18H2) rollout might now be two to three weeks away. For the last few months, new build previews […]

Continue Reading