"CHKDSK" is one of the more popular commands that you will come across in XP and 2000. For boot problems you should always try the "CHKDSK /P" (Outside Operating System (Recovery Console) or "CHKDSK /F" (Within Operating System) option first before you go about reinstalling or repairing Windows.

vale. . .

cuando entras en la bios tambien te pasa lo la pantalla?