ok. WIRE one system to the router.
use your browser to access the config page
http://192.168.0.1/
login
now set the router to be the DHCP server.
leave the encryption OFF until things work for you and then go back and enable it.
alter the SSID to anything other than the default
be sure to CHANGE the admin password
(do this last, this will cause you to loose the browser connection).
make sure the router restarts.
while connected via a wired connection, use your browser to access
www.google.com
if this fails, go to View Network Connections
find the Lan->properties
click the Tcp Protocol and then properties
make sure that DHCP is set for IP address and DNS.
click the Alternate Settings
remove anything there
save
disconnect the wire; wait 15 seconds and replug
your browser should be working.