Persistence through .bashrc and .bash_profile
Format hard drives securely by using the windows command line utilities cipher and format, cipher can be used to wipe empty disk space, but if you perform a format of the drive, then the entire drive will have empty disk space allowing for a secure delete by overwriting with zeros then ones followed by random numbers.
Step 1: Format the Drive
Step 2: Open CMD
Press Windows+R to open “Run” box.
Step 3: Run Cipher
Step 4: Run Format
format <driveletter>: /fs:NTFS /p:7
Alternatively if you would like to use a third party tool that is faster than built in windows tools, there are great third party tools like DisposeSecure from east-tec. DisposeSecure is designed to run from any bootable device like USB, CD, DVD or floppy and will offer you a great flexibility in the wiping process by making it independent from the operating system that was previously present on that system.