Some of my laptop settings seemed to have resetted, how can I fix these problems?

Well I had a presentation for one of my classes & I plugged in a projection beamer to my laptop. After that I noticed that some of my settings from my laptop have changed!
The thing I want back is, you know when you put your computer on standby and when you have the lid closed but when you open it back the window shows yours user name with the picture and you have to click the picture/name to open the windows. Well that setting I want back. How can I fix it?

I am using Vista btw.