A week after the public release of Windows 10, Microsoft issued the Cumulative update that includes improvements to enhance the functionality of Windows 10.
Windows 10 Cumulative update for Windows 10 for x64-based systems (KB3081424), replaces the 3074683 update.
The update fails to install, throwing an error - "We couldn't complete the updates, undoing the changes". The installation gets stuck at 30%, reboots and uninstalls the update. Here is what happens while installing the update explains a member at the Microsoft community forum.
I have the same problem. The KB3081424 will not complete the install. It gets to about 30% and then reboots and uninstalls the updates. I downloaded the update directly and tried that method of install and get the same problem. No success. This is a major problem that needs a fix.
Forum member RicardoTongel, who has shared a possible workaround for the issue, observes that some invalid registry entries residing at the location (HKEY_LOCAL_MACHINE / SOFTWARE / Microsoft / Windows NT / CurrentVersion / ProfileList) might be related to user accounts that no longer exist in the system itself. Hence removing them should resolve the error and you can get started with the installation.
Try out the following fix if you are facing installation error with the Cumulative update.
How to fix Windows 10 Cumulative update getting stuck at 30%
Step-1: Click Start, then launch registry editor by typing regedit. When the 'regedit / Run command' displays on the top of the list, press Enter
Step-2: Inside the regedit, navigate to the following code
Step-3: Back up the registry key. In the ProfileList, click File, Export then choose a suitable location on your desktop and type in a file name and save
Step-4: On the left, you should see a list of profile IDs, such as S-1-5-18, S-1-5-19, S-1-5-20, including several other names
Step-5: Search for ProfilelmagePath. If any entry in the ProfileList has a ProfileImagePath that is not useful, right-click on the Profile ID and select Delete
Step-6: Close the regedit file, then reboot your system. Click Start>> Settings>> Update & Security, you should now be able to see KB3081424 and it should start installing
Hopefully, the above fix should help you overcome the installation error, allowing an error-free installation experience.