@Kevin_Z Already reset it multiple times, didn't work. The 5 GHz settings are grayed out and unclickable without any comment. The button on the back side only triggers the 2.4 GHz led. I am starting...

Hello everybody, I just bought a new (?) and shiny Archer C7 from Amazon (Region: Europe), and tried to set it up. Had a bad surprise - 5 GHz WiFi is completely disabled because of some...