Internet Connection Problems

I’m running an Win ME machine which wont let me connect to Internet, when I try, I get an error message ‘please check your connection parameters to make sure nothing is missing, to do this go to Internet properties and click on the content tab’. When I do this I get asked for a supervisor password?!! Email works fine and the problem seems to have occured since loading Norton Internet Security, since uninstalled but still have same error message. Any help much appreciated, thanks, L.