One computer is down on the network

[cothrift]

I have 2 computers and Xbox live on my internet connection. The main computer is hard wired, while the other is wireless PC. One day I lost connection to the internet and when it came back I could never register a connection to the internet on the wireless system. I get a connection signal, and it says that I am connected but when I launch Explore I can't connect. Anyone hav eany suggestions because I have tried everything.

 

[DelJo63]

reboot the modem and routers.

update the firmware to all devices.