Secure Erase and HP Disk Sanitizer are tools used to remove data from a hard drive or solid-state drive permanently. The deleted information cannot be recovered. Use Secure Erase or HP Disk Sanitizer ...
Most people assume that deleting files and emptying the Recycle Bin permanently removes them—but that’s not true. Those “deleted” files still sit on your drive and can be restored with recovery tools.
The Windows tool Diskpart overwrites all data on the hard drive with a zero, which is considered a secure deletion method. This applies at least to classic hard drives, i.e. HDDs with magnetic discs.