U may try R-Studio software. This is the files best app a used to recover files. But like u said. A windows had reinstalled over formatted HDD. Files at the beginning of HDD sectors may not recovered. (New windows files overwritted that sectors) Today my friend came with just same problem. He just wanted his photos. We coluld recover over %95 of files I hope u can recover all file u need. PS: Sorry this was an old topic. I am allitle drunk. I didnot look at first post date But still i advice R-Studio Fast and stable.