I think im having a slightly similar problem, I did update my graphics card, im running the game in 16 bit, while my computer is set on 24bit \"True Color\" I get to the loading world screen and the bar fills up about less then half way, then PS stops responding and just kinda crashes, I am not running it in full screen anymore either and the sounds is off...any ideas? should I just keep trying?
I even turned my Firewall and Virus Protection off, and still I cant get anywhere...But before I even updated my driver i got to GUI loading...