I tried to go through the troubleshooter and it suggests that the physical switch is off. Even if I click network settings and click the wifi toggle it instantly goes back to off. When I click on the wifi button in the taskbar it says the WiFi is 'Turned off'. I have an Intel Dual Band Wireless-AC 3165 adapter and, ever since yesterday, it stopped working completely. I'm recently experiencing issues with my Dell Inspiron 15 7559.
