i have just downloaded BackTrack 3.0 for USB, and installed it. But when reboot my pc and boot it from USB, everything is ok but i cant use user interface. For example if i tried to open an aplication from system menu, a windows is open but i cant to anything on this window and other things.

So i have to reboot again anda again. I have search this issue on the forum but find nothing, do you have any idea, is this problem related of grafic cards or anything like that?