One pc can connect to internet while the other one cannot!

joewei_89 Posts 2 Registration date Friday January 23, 2015 Status Member Last seen January 23, 2015 - Jan 23, 2015 at 02:38 AM

Recently I installed a WiFi router (linksys) , i don't know why the sometime the router connect to internet it won't work and sometime its work. then i checked through CMD-> ipconfig... I found that if I can connect to internet the gateway IP is ( but if I can't connect to internet, the gateway ip is (
which is (modem IP address) (router IP address)
sometime i can connect to modem IP, sometime will not. I wonder why, any setting to prevent the pc to connect to only modem IP address... Please help!!