Enable Ctrl-Alt-Del at login screen
This is a quick tip in case you need to enable the Ctrl+Alt+Del login screen in Windows XP for additional security.
Using this is far more secure than the traditional XP login screen due to the fact that no program can intercept CTRL+ALT+DEL. Thus you are protecting yourself from a application (a bad application, could be spyware or a virus) from learning your machine password.
How to do this:
- Press the START button, go to Run…
- Type control userpasswords2, and then press ENTER
- Click on the Advanced tab
- Check the box in the Secure Login section
- Click Apply and then Reboot, and the Ctrl-Alt-Del login screen should appear
Hope this helps. 
