internet connection is down please configure router error

[vpn2012]

Hi guys when i open internet explorer and open internet this message display internet connection is down please configure router
and yahoo not open or any website
this error display in more computers in network but not all meaning that this message display in my computer and another computer work internet in it.how i solve the problem please help me

 

[goombawaho]

Log into your router's management interface - usually something like this depending on your router brand.

192.168.1.1
192.168.0.1
etc.

Check all the settings:
DHCP server - ON and enough addresses available in the pool for all the computers on your network. Maybe something like 192.168.1.50 - 192.168.1.250

Check that DNS servers are correct or set to Automatic

Check computers that work against computers that don't work for:
Receiving IP address automatically
Default gateway set to router address
DNS set to automatic