Limited or no connectivity on a network connection usually has something to
do with a problem with your DHCP settings. DHCP assigns IP addresses (dynamic
ip) rather than hard coding your ip address in your connection settings
(static ip). You need to find out if you are running static or dynamic ip's.
If you are a stand alone workstation accessing the internet, then you are
probably running dynamic ips with your ISP providing your DHCP. If you are on
a network, you need to check with your network administrator to see what your
your settings should be. These settings are located in the TCP/IP properties
of your network connection settings.
Good Luck.