Hangat nakikita nyo na may ilaw ang lan led and wimax led it means may chance pa, telnet dapat naka enable,Administartive privileges is a must sa mga commands na gagamitin nyo para sigurado.
run telnet and try to telnet your gateway. your gateway can be found by running cmd then type ipconfig then under "Ethernet adapter local area connection" makikita mo na
deafult gateway. Pag telnet mo ng gateway mo at ang lumabas ay "could not open connection to the host bla bla bla" candidate ka sa ganitong sitwasyon.. then continue
Check mo sa services mo if started ang DHCP Client. Type winkey+r then type services.msc then check if "started" ang status and naka "automatic" ang startup type ng DHCP client.