Hd Software How Can I Wipe My HD Clean (format) Without Using Software?

How can I wipe my HD clean (format) without using software? - hd software

Done online research, I learned that even if you reformat your entire hard drive, you can with the DOS, the files can be restored. Is that true?

I know that when you empty the Recycle Bin - files are restored. But what about formatting the C drive, all, but this should clean all clean ...

I say this because I want to reinstall a fresh copy of Windows XP. I also read about the software called WipeDrive. Is it really effective?