how can you be sure a file is really deleted from your computer?

Question

I mean really deleted not just the fake deletion where files can be retrieved from the cops

Answer 1

The only real way to erase data from a hard drive is to literally destroy it with a magnet.

Found this :

Something called Secure Erase, a set of commands embedded in most ATA drives built since 2001. If this is so wonderful, why haven’t you heard of it before? Because it’s been disabled by most motherboard BIOSes.

Secure Erase is a loaded gun aimed right at all your data. And Murphy’s Law is still in force. But hey, if you’re smart enough to read Storage Bits, you’re smart enough to not play with Secure Erase until you need to.

How does Secure Erase work?
Secure Erase overwrites every single track on the hard drive. That includes the data on “bad blocks”, the data left at the end of partly overwritten blocks, directories, everything. There is no data recovery from Secure Erase.

Answer 2

try webroot window washer - not only deletes the file but you can run a scan to retrieve lost memory from registry errors

Answer 3

Put in a new hard drive if you really want to be sure.

Answer 4

wel listen to me there is no way a file is deletted completely from ur pc cuz there wil be always traces left that people can track it however there r certain por progrmas that can accoplish wut u want i dont recaal there names for now