Uneraseable File
We have an old Windows 7 machine that needs to be returned to a client and as such, I need to make sure the free space has been erased. There is single deleted file that is never overwritten. It is a large (600MB) zip file of email messages.
I have used CCleaner, Glary, Eraser, Privacy Eraser and FreeSpaceWipe; erasing cluster tips, free space, MFT free space and recoverable MFT file names. 0s, 1s, random; single pass and 3 pass DoD. This particular file (Thunderbird.zip) is ALWAYS LEFT. :) Nothing else is recoverable (Recuva). chkdsk finds no disk errors.
I've tried recovering the file (it unzips successfully) and then deleted it to no avail, and I then recovered it again and shredded it in the recycle bin. No joy. The file can always be recovered.
It's driving me nuts! Has anyone experienced something like this?
