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How to fix Windows 10 KB3156421 & KB3156387 failed to install

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2016-05-13 15:14:07 Posted by Hattie to Backup Resource

Here are a few possible ways to fix KB3156421 & KB3156387 failed to install issues. Read to learn how to fix KB3156421 fails and computer hangs on reboot and KB3156421 fails to install and rolls back and other problems.

Overview of Windows 10 KB3156421 & KB3156387 fails to install issue

Recently, Microsoft released its Windows 10 May updates KB3156421 & KB3156387. And Just like it happened with many other previous cumulative updates, KB3156421 fails to install on a number of computers without any other information. 

Windows 10 cumulative update KB3156421 fails to install, error code: 0x80073701? Anyone have any ideas how this works with windows 10?

Windows 10 KB3156387 fails to install after downloading & reboot, then rebooting & removing the update. How to fix? 

According to reports, Windows 10 KB3156421 fails to install issue usually occurs in two situations: KB3156421 fails and your computer hang on reboot and KB3156421 fails to install and rolls back (uninstalls). If you are suffering any one of the KB3156421 fails to install problems, please don’t worry! Here we have collected solutions for these issues. 

Fix KB3156421 fails to install by uninstalling the update

Actually, now there is no official solution for KB3156421 fails to install issue. But if you are facing a failed KB3156421 update, here’s a way to help you get out of this situation. Just reboot your computer in Safe Mode, uninstall the update and use the Windows Update Troubleshooter to hide the update so that it doesn’t try to reinstall itself and put you back in the same bad state.

To uninstall KB3156421 in Safe Mode, follow steps:

1. Reboot your system into Safe Mode (You can do this by pressing the F8 / F11 key [the button will vary from one OEM to the other] on your keyboard at the time of POST, the screen that comes before the Windows 10 logo)

2. When in Safe Mode, Login in as the administrator and delete the update.

3. To do so, you have to access the desktop in Safe Mode and search for “View Installed Updates” in the search box (Windows Key + S) and click on the View Installed Updates – Control Panel on the results page.

4. You will see the update that is causing trouble (In this case, KB3156421), select it from the list and click on “Uninstall“.

To hide KB3156421 update in Windows Update Troubleshooter, follow steps: 

1. Open the Control Panel (icons view), and click/tap on the Windows Update icon. 

2. After Windows Updates or you check for updates, click/tap on the .....update(s) is available link. 

3. Right click or press and hold on a listed Windows Update that you want to hide, then click/tap on Hide Update. 

4. If prompted by UAC, then click/tap on Yes or enter the administrator's password. 

5.You will now notice that the now hidden Windows Update is grayed out. Repeat steps 3 and 4 to hide another Windows Update. When done, click/tap on OK. 

Fix KB3156421 fails to install by reverting back to previous Windows version

Except for uninstalling the update, you can also choose to go back to the Windows previous version to fix KB3156421 failed to install problem. This method is also helpful to fix other issues of Windows 10 KB3156421 update.

To go back to the Windows previous version:

Open the Start screen or Start menu and select Settings. Navigate to Update & security > Recovery. Click or tap the “Get started” button under “Go back to an earlier build” to uninstall the current build of Windows 10 and go back to the one you were using previously.

And you can also choose to use EaseUS Windows backup software to backup computer before major Windows 10 update. So you can easily and quickly restore your system & data from the backup image if something bad happened during the update process. 

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