Recently I have found files and folders which I cannot get rid of no matter what I do. As well as delete I have used 4 different shredding/wiping/destroying apps with multiple wiping, including wiping the released disk space ---- many, many times. It seems to work, but after a reboot they are back again. I have tried various things, such as moving offenders to an external USB drive which I then format, thoroughly. The files reappear in the previous location.
Among the problems this causes is the failure of updates to apps / programs. The older version will not go away and even when I launch the updated version what happens is the old version appears, not the new one.
I have spent many hours on this, repeating the deletion / shredding endlessly. It is driving me bananas. I am not referring to the use of spe cial recovery apps like Recuva.