Re: making previously deleted file unrecoverable ???
You can overwrite the data several times, but that's not 100%. If you use something like powermax or killdisk and run it several times you will have unrecoverable data. But that wipes the entire drive. Or you can just smash the drive with a sledgehammer a few times. That always works.
Change the world. Of one person. Today.
If your equation requires either a complex combination of variables to get the desired result OR you can't seem to get the result regardless of the variables....it ain't your variables, it's your constant.