My windows vista laptop has for some reason frozen on the loading screen, although the loading bars move it does not load the startup routine. I have tried the windows vista startup repair via disc but that did not make difference, I have also tried a system restore which did not work either. Is there a command I can do via cmd prompt? what do I have to do? I can load the computer in safe mode as well, I done a norton internet security scan but that picked up nothing.