I tried to install Ubuntu 12.10 but for some reason the process stopped half-way and wouldn't progress, after some time waiting I decided to reboot and to my surprise my D: partition, where I have some files stored, was entirely occupied by Ubuntu.
I assume that the filesystem of the partition was changed from NFTS to ext4, so I lost access to the files on Windows. Later I recreated the D: partition again as NFTS, with its original size, and didn't do anything else with it, hoping that none of the files would be overwritten, but the partition was empty. I expected that, as I assume during the Ubuntu installation, the partition is formatted.
However I was hoping it would be possible to recover them. I already used PhotoRec tool to try the recovery of such files but all I am retrieving is thousands of text files, apart from a few intact files randomly named.
Is there any possibility to recover those files, given the circumstances described above?