Having an issue with my Archer C9, AC 1900 wireless Dual band gigabyte Router. Purchased April 2016. (The C9 model was not an option in the dropdown box) ??
My service provider Spectrum sades that the signals are OK but the modem logs show interference and the WiFi keeps changing signals which cause me not to connect my Roku sticks. I also have a TP-Link Extender in my basement to help with coverage. I've been using this configuration for over a year without issues, yesterday the problems started.
Also how do I check/update firmware?