The computer contains two internal hard drives. One of them works, one of them doesn't. There is
also a working external drive, very large.
The hard drive is not mechanically dead. It spins up. The files are there, I just can't open them.
The important thing is, I need some step-by-step instructions on how to create a totally-safe and
totally isolated place on the live drive, for recovery. I don't want to infect my working drive with
any possible virus on the non-working drive.