Hi All, I have two series of laptops with me : I have 10 units of each Dell Precision E5520 and M4700. I need to know how to do a secure erase for these laptops. I don´t want to do a normal format using a windows CD or Linux Live bootable. Appreciate if someone can help. I have tried to follow the below article but the option of Wipe disk is not visible at all anywhere in the Bios. https://www.dell.com/support/article/us/en/04/sln137285/security-erase-feature-on-hard-disk-drives-for-e-series-notebooks?lang=en Regards, Thads