Fix the Failed to Install Important System Update Error in Zorin OS
July 9, 2025
After installing Zorin OS, you may get an error message that is something like this and is about the firmware.

While this error looks scary it isn?t and is a known bug for most distros. The firmware has updated correctly but the error message still remains.
Fortunately, the fix is simple and requires deleting the pending.db file which is located in the /var/lib/fwdup/ path.?
Open the Terminal and navigate to /var/lib/fwdup/ path.
cd /var/lib/fwdup/

There check if this file pending.db exists with the ls command.
ls

Delete that file, you will need to be sudo to do that
sudo rm pending.db

After deletion, restart your PC. That annoying error message should no longer popup once you login after the restart.
All done.