Here’s the truth: you don’t actually need EasyTune or @BIOS. You can:
A very outdated BIOS can sometimes cause compatibility issues with Gigabyte's Windows utilities.
Prevents the @BIOS app, and sometimes other Gigabyte tools like RGB Fusion or Fan Control, from launching or functioning correctly.
If reinstalling didn’t help, the file exists but Windows can’t see it correctly.
If all else fails, Windows core files may be beyond repair.