Last week, my laptop hung for a while, I couldn't do anything then it went into automatic repair, then it tells me it was unable to repair the pc. I had to reinstall windows, I found my files in windows.old. This same issue has just happened today, and I tried to do a new windows installation like last time, but this time, when I got to the windows installation screen where you select the partition type. I noticed my primary 932GB partition was completely unused, but I proceeded with the installation anyway, now installation is complete. All my files are gone! Harddrive is completely free! There's no windows.old. How can I recover these files, please?