If you have installed 'anything' in vista, you have encountered one of these 'This program is trying to run 'blah blah blah' and windows needs your authorization to do this.' And you need to click to respond. You have just encountered the User Account Control. It is a new 'feature' in vista, that helps protect users from having unauthorized scripts run. basically, if you didn't just start trying to install a program, update a driver, or change a security setting, then don't click 'authorize', click 'cancel.'
but honestly, does 'anyone' actually read what those alerts say? This is why I just turned it off, because I don't typically pay attention to anything windows has to say to me. I realized that if an authorization window popped up saying 'windows was told to run the script 'murder your computer and steal all your stuff' i would just click through it an not even read it. The way this would work better is if you had automatic authorization for stuff like installing programs through install shield and altering security settings. If somehow, it could register when an unexpected script was trying to run, I would pay more attention, but when it barks about 'everything' i do, it's annoying, and that defeats the entire idea behind the UAC concept.