difference between format and delete

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10 Feb 2011
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Hi when it comes to formatting windows what is the difference between format and delete. I'm using my old pc to format not my new one but have always pressed format first and then delete each partition. if I click new I would get 4 partition. I cant remember what there called apart from back up and primary etc. If I just delete all 4 and press new I just get 2 partition. so what the difference and should you format and delete partition or just delete with out formatting if install new windows?.
 
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