Thank you. The name of the firmware update file I used is: ArcherC7v2_en_us_3_15_1_up_boot(160719). I'm hesitant to post the configuration file here in this forum - is there some detail I can check...

Same problem and I notice others had it years ago with another one of their routers. I had to upgrade b/c the router was so buggy and now this. What a mistake to buy this product....