Live Usb Ubuntu 12.04 stuck at loading screen after force restart

[hrist]

I was trying to shut down but i wont so i press the restart buttom on my PC. After that i booted again in usb but it wont load. Always stuck at loading screen (ubuntu logo with 5 dots..). Did I corrupt my usb because of that restart? Can i fix this?

 

[HTDG]

try pressing crtl-alt-f1 when it gets stuck, if that pops up with a bunch of text, it might have an error at the bottom.