FWIW: Ntfs.sys missing or corrupt error message - http://support.microsoft.com/kb/555531
"Stop 0x00000024 or NTFS_FILE_SYSTEM
A problem occurred within NTFS.SYS, the driver file that allows the system to read and write to the NTFS file system drives. There may be a physical problem with the disk, or an Interrupt Request Packet (IRP) may be corrupted. Other common causes include heavy hard drive fragmentation, heavy file I/O, problems with some types of drive-mirroring software, or some anti-virus software.
Perform the steps below to resolve the blue screen error.
Run CHKDSK (Check Disk) as a first step. For more information, refer the Dell Knowledge base article, "What is CHKDSK (Check Disk) And How to Use it With Windows XP?" Article ID: 351005.
Disable any anti-virus software, firewall software or backup utilities that might be installed on the system.
Run an SFC scan on the system so it can check for any missing or corrupt system files. For more information, refer the Dell Knowledge base article, "How to Run the System File Checker With Windows XP?" Article ID: 351023."