windows could not start because the following file is missing or corrupt: system32\Drivers\Ntfs.sys

My laptop displayed the above message after I had previously converted my hard disk from fat32 to NTFS. The resolution I have taken to resolved this problem were as follows :

RESOLUTION
To resolve this problem, replace the missing or corrupted Ntfs.sys file:
1. Use the Windows XP startup disks or the Windows XP CD to restart your computer.
2. When the "Welcome to Setup" screen appears, press R to select the To repair a Windows XP installation using Recovery Console, press R option.
3. Type the number of the Windows installation that you want to access from the Recovery Console, and then press ENTER.
4. Type the administrator password when you are prompted, and then press ENTER. If no administrator password exists, just press ENTER.
5. At the command prompt, type the following commands (press ENTER after each command):
cd \windows\system32\drivers

ren ntfs.sys ntfs.old

( Note This step renames the corrupted Ntfs.sys file to Ntfs.old. If the
Ntfs.sys file is not found, the file is missing.)
6. At the command prompt, type the following command, and then press ENTER:

copy cd:\i386\ntfs.sys drive:\windows\system32\drivers
Where cd is the drive letter for the CD-ROM drive that contains the Windows
XP CD, and drive is the drive where you installed Windows XP.

7. Remove the Windows XP CD from your CD-ROM drive, type quit at a command prompt, and then press ENTER to quit the Recovery Console.
8. Restart the computer.

Hope this helps.