Hard Disk Data Delete problem

Users questions: I sold an old computer someone else, hard drive I have had some very important records of account passwords. I sold to someone else before, that those important common method used to delete account password, then copy a lot of stock data over the entire C inventory. Finally, we utilized common way to delete stock data. (I still would not use "Smash delete" method) Is this treatment, others may also restore my account and password?
Experts answer: is unlikely to restore the account, but why would not save the password file, the password into the wrong account and then save, and then easily removed on the trip, he is useless to see ah
  • This information provided by the users.Thanks!