One fine day you start your PC and get messages that say,”Book Disk failure”. The problem is that the hard disk is detected but the OS does not load. The system may get stuck in the second screen during the booting process or the OS might display an error message and refuse to load. Such situations can be trouble some as they leave you with very few troubleshooting options.If your problem persists, or if you never used a boot loader, than boot into the system from a boot floppy or the Windows CD.Windows 2000 and XP users should boot into the recovery console. Go to the command prompt and give the command fdisfk/mbr’and then give the command ‘sys C’. This clears the MBR, and makes the bootable partition C, Windows 2000 and XP users should give the command ‘fixmbr’ and’ fixboot’ C: to do the same. Then restart the system to boot into the OS.

If you still have trouble, you might have a virus on your PC’s boot sector .It is difficult to confirm an infection without a virus scan. Thesymptoms of an infections-applications slowing down or many unrecognized files appearing in the system-should give you a clue. For example Windows 98 and Me users might see a message during boot up that says,” No valid FAT on boot drive” this is caused due to a boot sector virus called stoned Monk. Even reinstalling Windows might give you an error message that says, “Your computer already has an operating system installed”. Then best solution is to connect the hard disk to another system, and scan with an anti virus tool. You can also create a rescue disk for the anti virus tool and scan the system using it.

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