Does't work for Win7

I downloaded the version which states works in windows 7. When I choose one the pre-installed logons and then click apply, the computer locks but the logon screen is exactly how it's always been. I even tried running it as Administrator. Still doesn't work.

 

I've also tried it on my friend's win7 machine, and had the same effect. This hasn't been working for a long time, I know that. This isn't the first time I've tried using it.

 

Either fix it...