Right. Don't touch. Don't boot it up anymore. Each time you do, you place the data it contains at risk.
Go to GRC.com, and procure SpinRite. Nothing on the planet can recover as throughly as SpinRite does. It's used by the FBI, NSA, and many others, including tons of Police Depts for forensic analyses and evidence gathering.
Steve Gibson is the father of data recovery and one of the finest in the world.
Watch
HIS VIDEO Here BEFORE you buy or use anything.