Disabling On Screen Keyboard (XP)

Hi there,

Does anyone know how to remove or disable the on screen keyboard from Win XP, file is:

c:\windows\system32\osk.exe

It seems like I can delete it OK, but when I run "osk" from the command prompt, back it comes.

I have also removed the Accessibility options registry folder:

HKEY_CURRENT_USER/Control Panel/Accessibility and restarted the PC, did not work.

Wanting to remove any unwanted applications on a touchscreen system/ enhancing hacking security.

Cheers,

Steve