Hello I am from India, my ISP is ACT Fibernet My connection package is 75Mbps U/D When I connect the LAN cable from my ISP's network switch directly to my laptop, I get the rated speed of 75 for both

Hello everyone, I am from India I bought the Archer C60 in July of 2018. Since past 2 days, the router has started to randomly reboot. 5 devices (2laptops + 3cellphones) are connected to it via WiFi.