What version of ESS are you running as in 8,9 or the new Internet Security 10 ?
ESS licenses will activate ESET Internet Security 10 which you can install without removing your current ESS version.
As for manual OS updates what is your setting "Never Check For Updates" / "Download updates but let me choose whether to install them" / "Check for updates but let me choose whether to download and install them" ?
Important updates should be installed.
Any browser extensions or ad blocker ? Consider HTTPS Everywhere and uBlock Origin in FF
Consider adding an additional on demand scanner such as Zemana Antimalware
Thanks for sharing your config