ntfs.sys missing or corrupt error message:

To resolve this problem do the followings:-

1] Boot computer with the Windows XP CD-ROM in the CD-ROM drive.

2] To repair a Windows XP installation using Recovery Console, press R.

3] At the command prompt, type the following commands:-

cd \windows\system32\drivers [Press the ENTER Key]
ren ntfs.sys ntfs.old [Press the ENTER Key]

If the ntfs.sys file is there and corrupt it will rename it. If it is not there then it was missing.

4]At the command prompt, type the following command, and then press ENTER:
copy X:\i386\ntfs.sys drive:\windows\system32\drivers [Where X=CD-ROM Drive]

5]Remove the Windows XP CD from CD-ROM drive, type quit, and then
press ENTER to quit the Recovery Console.

6. Restart the system.