The Navigation Bar and Back & Forward buttons are all missing.
I have tried going to View,Toolbar,Customise - Restore Default Set but nothing happened
Also there is no icons to drag them back into place. Has anyone had this problem or know how to correct it?
My laptop needs to be fixed so using My Home PC but this is really annoying - Please Help!
Oh yeah and I have tried turning my computer off and on again nothing - Lol

Try uninstalling it and then reinstall! Also make sure that you have the right toolbars on. Go to VIEW / TOOLBARS

Uninstall Firefox and use another browser.

Now, nunulka, firefox is a good browser.
Certainly better than IE which has a security flaw that hasn't been fixed for a very, very, very long time!
(Plus one that was fixed this week - if you use IE, make sure you install all the windows updates that pertain to IE that are available to you)

But back to the topic.
Right-click on the menu-bar, and make sure that "Navigation Toolbar" is selected.