How to make users require Ctrl alt delete at logon

NOTE:YOU MUST BE RUNNING WINDOWS XP WITH THE CLASSIC LOGON SCREEN

First click Start->My Computer. Click Local Disk. Now click Windows. Next, click system32. Now, look for a file called secpol. Open it. Now go to local policies->Security options. Now click Interactive logon: Do not require CTRL+ALT+DEL. Now click disable and your users will require to press ctrl alt delete at logon!