Poor Connection To The Internet

Right, here is the problem.  I have recently installed Broadband internet to a computer in my home.  There is no problem connecting to the internet.  However, when connected, the internet is of a very poor quality, meaning every page I want to view usually comes up with the title "This page cannot be displayed".  I have checked my modem status, and noticed that the computer is sending more "Packets" than it is receiving.  I am assuming that this means the computer is sending more data than receiving, and therefore may be the cause of the problem.  If anyone can confirm this and help me in creating a connection with good quality, it would be much appreciated.