I use a GPARTED Bootable LiveCD to delete all partitions on a drive, gives it the same status as the day it shipped from the manufacturer. Could use a Linux LiveDVD that has GPARTED in it or as my setup is now, my Linux Mint desktop with a USB Drive dock that accommodates both 2.5" and 3.5" drives. The two Live discs mentioned are downloadable as .iso files used to create an exact duplicate of the original disc and free.
For a Hard Drive Windows 10 Installation Media usually suffices... Boot from the Installation Media, at the language screen select Next, then Repair your Computer. Select Troubleshoot and then Advanced Options then select command prompt.
Type in:
DISKPART
followed by [Enter]
LIST DISK
followed by [Enter]
SELECT DISK 0
usually its 0 for a system with a single HDD. Then press [Enter].
CLEAN ALL
this will write 0's to the entire HDD which may take a while.
You can repeat this multiple times if you want to be sure (but this isn't normally required).
For other types of drives such as SSDs and HSSDs you are best to use Parted Magic as it has Secure Erase. The primitive algorithm in DISKPART CLEAN ALL does not work properly on these drive due to the differences in the way these drives handle data. Moreover its ill-advised to write intensively to a SSD unnecessarily. Secure Erase essentially flushes all the electrons out of a SSD. I explain the procedure in some detail here:
SSD and HDD Secure Erase using Parted Magic - YouTube
Please update the system specs in the "My Computer" section:
How To Fill Out Your System Specs
System Specs - Fill in at Ten Forums:
System Specs - Fill in at Ten Forums Site Use Tutorials
In the left corner below in your post you find 'My System Specs'.
After clicking it you can find a link a little below that says 'Update your System Spec', click on this link to get to the page where you can fill in your system specs.
System Info - See Your System Specs - Windows 7 Help Forums
Please include information on each drive.
Also I just noticed that some newer business models also have a Data Wipe feature embedded in their UEFI BIOS. I made a video yesterday demonstrating this with my Xtreme Performance System (XPS) 13 2 in 1 9365:
Dell Data Wipe - Securely Erasing your Internal SSD using the UEFI BIOS - YouTube
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