Maybe I'm just being stupid, but isn't information on a computer stored as numbers....ultimately it comes down to 0s and 1s, right? Why don't computers just delete a file by changing everything to zeros, and leaving no backups, or anything else to find the file by? I find it highly annoying that such a program is available...I deleted those files for a reason
Basically the way windows deletes files is that it tells itself the space the files you deleted used is free. Then when it goes to write data it uses that space.
It doesn't "overwrite" the data to make it unrecoverable. CCleaner can do this with the files it removes and soon recova will be able to do it with the files it lists.
All I can tell you is if you think its annoying to be able to recover your files, don't use recova.
It will come in handy though for that 1 file you accidentally delete one day.