So sorry to hear that Jacqui, when my system got corrupted last year, it had to go back to the shop, and the man there was able to retrieve a lot of my stuff that had been lost. In my case windows itself had got corrupted when I was downloading something, I couldn't even switch it on, so perhaps all may not be lost, if worst comes to worst could you try a computer shop, see if they can extract your files from the hard drive.
Sue