Are you having troubles getting to websites?  ....the ones that really shouldn't be blocked but seem to be.

Try this:

Open System Preferences ->  Click on Network

Click on Advanced

Click on the DNS tab

Selecting the sets of numbers one at a time, click on the -  symbol in the lower left corner to delete all of the DNS numbers in the left column.  There will probably be 3 sets of numbers there.

Click on OK

Click on Apply

Now restart your computer.

All should hopefully be better now..... Let me know if this is not the case.

-BG