How do I turn off my browsing history on windows vista?

I have a long list of things sites that I have visited in the past still in my browsing history when i press the arrow button in the main search bar that I am trying to delete. Every time I delete them, they re appear and it is taking up a lot of space and taking forever to find pages I want to keep/go to again. I have deleted them time and time again but they keep coming back. Please help because i am getting fed up with it.
 
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