I always seems to never be able to navigate when ever I find myself using the Drupal interface (as wonderful as it is) and I finally found a quick solution to this.
Depending on how you have configured your theme, go to;
Click 'Blocks' under 'Site building'.
If you haven't, you first have to enable it. Go towards the bottom where you have navigate and then use the drop down to select where you want to have it;
Look for where you have configured 'Navigation' and click 'configure'.
Under 'Show block for specific roles:'
Click the radio button next to 'authenticated user'. The radio button for 'anonymous user' is ticked by default and you can tick or untick this (this will display the menu to any user who does or does have a login coming to your website).
View and change any other options you desire on that page then click 'Save block'.
Worked for me!