Hello, Can anyone suggest a good program to fully erase a HDD, which I can boot from a CD/DVD/USB Flash Drive? I have a Toshiba Satellite laptop computer and I had some sort of virus on the boot block because Windows 10 kept on rebooting after stating there was some sort of error message that Windows was incorrectly installed, then I turned off the computer, and it kept doing this. Then when I turned on the laptop again, I pressed down the Function F2 so I can access the BIOS, and I couldn't. I left it alone for two days. Then I remembered I purchased a USB Recovery Flash Drive from Toshiba when I first purchased it three years ago. The instructions said the when I put the USB Recovery Flash Drive, I should hold the Function F12 key when booting. A menu came up to restore the Toshiba laptop to the original settings, one option allowed me to erase the internal HDD complete, it took about 26 hours to accomplish a full erasure, and allowed me to reinstall Windows. Can anyone suggest a similar program, so I don't have to install Win 8, then reinstall Windows 10? I would appreciate any feedback, suggestions and/or comments. Than You.