i did more search and i found the answer
1 - on 'start' menu, we select 'run' and we write 'sfc';
2 - here we select the option 2: "extract file on instalation CD";
3 - we select the 'explorer.exe', on 'c:\windows' folder;
4 - after these, the Windows ask for reboot... after that the 'start' menu, will be 'Iniciar'.
it's fixed... but i need ask 1 thing: i belive the problem was the 'nusb33e', the USB installer.... but why changes the 'start' menu?