Hi Ray, thanks for your reply !.
Well I've left my computer for about 10 minutes with no result, so after that period of time I hard reset it.
I'll wait for 15, 20 minutes and see the outcome.
But what is strange is that happens randomly, even that I've not changed anything (like installing/removing programs, changing system parameters, etc.)
And also I'm not logging to any domain, in fact sometimes my computer is not connected to the internet and hangs up, and sometimes when I'm at work and connected to my office network it starts ok.
Anyway, will try to wait longer and see what happens.
BTW, does windows logs that behaviour? perhaps I could track the system events or something alike and see if there is something wrong.