You say it's not the keyboard, but I think it probably is.
Take a look at
THIS PAGE from Logitech. Their notification exactly matches what you posted above.
If you've used multiple keyboards, were they all Logitech? And if not, do you have their software installed? If you have that software, look for an option to disable it within that software. It's not an Asus thing. I use Logitech Options, but Logitech Setpoint is required for some of their devices, and that's probably where it's coming from, according to the linked page.
Davemon50