Internet Doesn't Work With Cable Nor Wifi

I've been having this DNS problem for 6 days or so. The internet doesn't work with cable nor Wi-Fi and I've tried almost everything, ping, configuring the DNS, IP, disabling everything, enabling everything, nslookup doesn't work, releasing and renewing doesn't work too, and to make things worst.(In the main computer, everything works just fine and the router settings appear to be correct too, my computer also works perfectly fine in other places with WLAN).