Another detail I could mention is that this is happening since working mixing jpg and cr2 files.
Usually, I don't mix them (only cr2) but the last two jobs I had to.
With Photoshop closed, CTRL+E launch it, splash screen and it works.
When I do it again with PS already open, I the issue repeats.
I've already tried turning off applications, notebook, and so on.
Now it's working. In fact, I'm in a middle of edition job because of a car race.
Thanks!