Well,
I tried to recover the previous BIOS version (Windows key + B key + power button) a few times, but didn't work, the result was always a blank screen and beeping sounds for more than a minute, so either my computer does not have that BIOS restore tool, or there's some trouble.
Then I downloaded the F.58 A version and installed it. A wizard came telling I was replacing F.5A with F.58 - 16/Oct/2008, when F.58 A's date is 8/Jul/2008. I agreed because it is told that F.58 A is a revised version, so, I think, it's related to F.58.
Operation ended, system informations say BIOS version is F.58.
Next I commanded a CHKDSK C: /r; didn't come to end, stalled about the same point as previous tries (52% concluded).
Then CHKDSK D: /r; didn't come to end either (33 % concluded, about the same point as previous tries).
Seems there was no issue with F.5A.
Back to disk, I have a disk image by Macrium Reflect. However It seems it could only be restored in a drive with, at least, equal capacity, I mean, it could not be smaller than the original.
But could it be a SSD?
Nomad