Error code 0x8007012F can occur whenever you try to install Windows Updates and fail. The error can pop up when you are installing app updates, system updates or feature updates. In some instances, as you can see in the image above, you might also encounter an error message indicating that there were some problems installing updates but we will try again later.
Now try again. Clear the Background Intelligent Transfer Service (BITS) queue of any current jobs. If necessary, you may enable BITS manually on your Windows 10 computer. Restart your device and on boot, rerun Windows Update. The process should complete successfully without the error.