Well, I used the three scripts, but it didn’t work… Now, after the third check, I also launched in Safe Mode and the file that now seems to be problematic is CLASSPNP.SYS; now it doesn’t even get to the black screen in safe mode, it stays blocked on the loaded files list…
Attached to this message are also the three logs (namely Fixlog1, 2 and 3, in the order you gave them to me).

Thanks again for taking your time with my case,
-Gankachi