I Have a Toshiba laptop that i recently bought and its a Windows Xp. My brother was doing something on it and it turned off. When i turned it on it went to the OS Menu(Safe mode, Start windows normally, etc.) So i choosed safe mode and saw windows xp logo, and saw the bar loading then all of a sudden i see a blue screen then turns black. Then it went back to the Os Menu, so then i tried the other options and the same thing occurs over and over. So i pressed F8 and choose the disable automatic restart and finnally saw what the blue screen which said I need to run chkdsk /f but i dont kno how to do it if my computer cant even load up the operating system. The error message is 0x00000024, and some other numbers. Can you please help me.