TP-Link Archer C7 (hardware version v2) is the most unstable-working router I ever had. It randomly stopped working at least once in two days. Sometimes I had to restart it three times a day but Internet was constantly dropping (even when connected via Ethernet) and Wi-Fi kept disconnecting all the time. Now and then 5 GHz network dropped until I power cycled the device. In summer 2017 I tried to upgrade its firmware to the latest version but nothing helped and I continued to reset the router on freeze. But here is a solution that finally helped me stop all those hangings and unstable work of Archer C7. Besides, we’ve got a workaround to fix such unreliable work of your router if the solution doesn’t suit you for some reason.