When attempting to install the latest Feature update, Windows shows the following message: 

Your PC has a driver or service that isn't ready for this version of Windows 10.

Cause

Older versions of ESET Endpoint Encryption are not compatible with newer versions of Windows 10. 

Solution

Simply upgrade EEE to the latest version. Please see our articles below to upgrade:

KB203 - How to upgrade ESET Endpoint Encryption (managed)

KB209 - How to upgrade ESET Endpoint Encryption (standalone)

Once you have upgraded EEE, you can install the Windows feature update by clicking Fix issues under Windows Updates in Settings. 

Related Article

If you have a system that is failing to boot after installing Windows 1903 (or later), then please see the following article: KB540 - Windows 1903 BSOD Shows "Inaccessible Boot Device"