When you delete a file, it is not actually erased from the hard drive, even after you empty the trash. In fact, data remains written to disk until others are written over it. Even after formatting the disk, the files remain and will be available to those who want and can read them. If you want to truly reliably delete a file or the contents of an entire disk, you need software that will overwrite the space where these files were once located. There are several free programs for these purposes.
Instructions
Step 1
First, it is recommended to use the Eraser program, which integrates with Windows Explorer. Once installed, you can simply right click on a file or folder and select Eraser. It is also possible that the file will be erased during the next boot, which is convenient if Windows does not allow you to erase it right now.
Step 2
The next option is that you delete the data in the usual way, and then use CCleaner to overwrite the free disk space. This is an extremely useful tool that performs all Windows functions related to data deletion.
