Fix error code 0xc1420121, We couldn't install this Feature Update

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This article lists the possible solutions to fix the fault code 0xc1420121, We couldn't install this characteristic update you may see on Windows 11 or Windows 10. One cause of this mistake is system file abuse. Some users take also stated that they started experiencing this error on their system after installing the Macrium Reflect software.

We couldn't install this update, simply you can try again (0xc1420121)

Error code 0xc1420121, Couldn't install this Windows Feature Update

If y'all are experiencing the same error, the following troubleshooting methods may help you:

Run the Windows Update Troubleshooter.
Follow standard resolution process for fixing Windows Upgrade errors
Update Windows using Media Creation Tool.
Tweak registry settings.
Check Windows Update Log files

i] Run the Windows Update Troubleshooter

Windows Update Troubleshooter is developed by Microsoft Corporation. Running this troubleshooter is helpful in case y'all receive an fault while downloading or installing the Windows update.

Follow the below-listed steps to run this tool:

Open the Settings app and click on Update & Security.
Now, click Troubleshoot on the left pane.
Later on that, you lot will run across the Additional Troubleshooters link on the right pane. Click on it.
Click Windows Update then click on the Run the Troubleshooter push.

When the troubleshooting process gets completed, check if you are able to install Windows 11/10 feature update.

ii] Follow standard resolution process for fixing Windows Upgrade errors

The standard resolution procedure for fixing Windows Upgrade errors include:

Verify at to the lowest degree 16 GB of complimentary space is available
Disconnect all external hardware
Disable or uninstall not-Microsoft antivirus and nonessential software
Free up deejay infinite
Update firmware and drivers.

Finally, run the Windows Upgrade process. If this fails, read on for some more ideas.

3] Update Windows using Media Cosmos Tool

If the above method did not solve your problem, you can endeavor installing Windows Update by using the Media Creation Tool.

Y'all can download this tool from Microsoft's official website. After downloading this tool, run it and select Upgrade This PC At present.

4] Tweak registry settings

According to the feedback of some users, they started facing this error subsequently installing the Macrium Reflect software on their organisation. In some cases, Macrium Reverberate software changes the registry settings due to which the user gets Windows 10 update fail error code 0xc1420121.

If you as well have installed the Macrium Reflect software, you should cheque the following registry setting and change it if required:

Launch the Registry Editor past typing regedit in the Run dialog box. After launching the Registry Editor, copy the following path and paste it into the Registry Editor address bar. Printing Enter when you are done.

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\WIMMount

At present, on the right pane, you lot volition detect a Cord, named equally ImagePath.

Double-click on it and check whether its Value Data box shows the following Value or not.

system32\drivers\wimmount.sys

If you detect the ImagePath string Value other than what nosotros take listed here, change it. Later on that, click OK to save the settings and restart your computer.

This should set up the error.

v] Check Windows Update Log files

When Microsoft rolls an update for Windows 11/x, the upgrade process creates tons of log files in every footstep. These log files are useful for assay if there is any Upgrade problem. While information technology may not find it easy to clarify, it'due south a gold mine for Information technology admins. This post will show you lot where to find Windows Update or Upgrade Log files.

Related posts:

Windows Upgrade error codes and solutions
How IT administrators can troubleshoot Windows upgrade errors.

Anand Khanse is the Admin of TheWindowsClub.com, a 10-yr Microsoft MVP (2006-xvi) & a Windows Insider MVP. Please read the entire postal service & the comments first, create a Organization Restore Point earlier making any changes to your system & be conscientious nigh any 3rd-party offers while installing freeware.