Solved! and the solution was already on the first comments, i don't know why, but the "preview drawing" settings was on Sreed, not on OpenGL, and i don't know why, because i don't know what is it and i never touched it (maybe some crash changed this options? some updated of the software or of the hardware?). Once back on OpenGL everything turn back normal. Thank you guys, i know probably it's a stupid thing for you all a setting mistake like that, but for me was a hell the last days on poser!