how can I recover files from my laptop?

hello Friends..Pls i have been using windows vista premium on my acer aspire, until one day, it crashed. so I had to use the facrory recovery disc which I created earlier on to recover the system and then I had to upgrade it from the vista to Windows 7 ultimate.. meanwhile all my documents, word, pdf, pictures and music had been lost.. and I really need all of these files.. please is there any way or any software that I can use to effectively recover all my lost documents and files ,..please I need help.. thanks a lot in advance...