win2k professional not booting

dear all

I am having win2k professional in my pc.. All of sudden while booting i am getting the following error.

INACCESSIBLE_BOOT_DEVICE, moreover it’s asking to check hdd for virus or give chkdsk/f for hdd corruption.

But i am able to access my drive through dos bootable disk. It seems hdd is not corrupted… I don’t have win2k bootable / repaire disk.

Kindly give solution to me

Thanks in Advance

Sakthi