How do I check if I've got EasyTune and how do I remove it if I have?
It appears in "Add / remove programs" as far as I remember. You can uninstall it from here. Maybe it is labeled "ET6" instead of "Easy Tune".
Otherwise, it shows up in "Program Files" or "Program Files (x86)". Maybe there is an uninstaller.
As far as I remember, I uninstalled it from "Add / remove programs" as well as all other Gigabyte softwares. Then I checked for Gigabyte folders in Program Files and manually deleted all them (sometimes, uninstallers fail to remove useless folders).