Ok, sorry for the very late response, but I wanted to do a bit of testing and I was not too much around during christmas time. So:
@JSB. Hum, I do not really know how can I know that. As there were many of them I assume that it they are not being fixed autmoatically.
@computersavvy. Thanks I could indeed see both with this method.
@all. Well, since the previous messages, I got the computer to freeze only once. And after the hard shut down it did boot normally! Without problem. Not sure why, but it seems fsck fixed it. As said, it happened only once since , so never knows, but for now I would consider the issue solved. I can post again if I get back to the same problem.
Thanks everyone for the effort in helping me. Now I need to open another thread, cause I can't get an external monitor to connect...