Hi,
I haven't done anything like this, but here's a thought... maybe you need to have MT move the mouse first, then do your ctrl+alt+del with password. My thinking is that if there is a screensaver, you might need some mouse or keyboard event to break out of it before you do anything else. Another thing to consider is if the field you type your password into is active as soon as you hit ctrl+alt+del. If it's not, maybe when you do the sendkeys, it's not sending them to the password field. You could force a click in the location of the password field before sending the password. Please keep us updated on your progress, it sounds like a cool use of the program!