You're looking for information on HDD Guru's low-level format and its license code. Here's what I found:
Required for business or professional use. Review: Pros & Cons Pros hddguru low level format license code
Removes the speed limit for home users. It usually costs a few dollars and covers lifetime updates. You're looking for information on HDD Guru's low-level
: The interface hasn't changed in years and looks like Windows XP-era software. hddguru low level format license code