I thought DBAN was one of the older programs? I tried an old version and the newest version. Both gave me that "finished with non fatal errors" meaning it didn't work.
I think Killdisk did a good job though.
Most of the files I found with Recuva (5494 files) were in C:\Windows\SoftwareDistribution. So mainly automatic update stuff. I fell a sleep and the computer installed some updates and restarted.
I found 1 picture though, Kobe Bryant and Justin Timberlake on the basketball court. Strange because I don't like basketball and I never downloaded it. I am not sure if it came with Windows as some sample picture or if the previous of the owner of the laptop downloaded it.