Insert the XP installation CD-ROM and reboot your machine.
When the installation menu appears, press the R key to start an recovery
When prompted, select the installation and enter the Administrator
password (if no,then it's a blank one)
At the console, navigate to the system32\drivers folder, assuming your
Windows folder is called "windows," by typing :-
Rename the current ntfs.sys file by typing :-
ren ntfs.sys ntfs.bad
Copy the ntfs.sys file from your installation CD-ROM to your current
location by typing :-
Be sure you include the period at the end of the command to instruct
your system to use the current location.
Remove the XP installation CD-ROM, then restart your machine.