How to install feature update to Windows 10, version 20H2.
The primary reason for failed installaiton of feature update to Windows 10, version 20H2, is outdated BIOS version of your Windows device.
To fix failed Windows 10, version 20H2, you have to update BIOS first from laptop/ desktop vendor’s website. Ensure that you are logged in to windows device as administrator.
Then run windows updates again now you should be able to install feature update to Windows 10, version 20H2.