Vista - Systems error message

I just booted up and received the following message:
"Systems settings protector has stopped working. A problem caused the
program to stop working correctly. Windows will close the program and notify
you if a solution is available."

I have no idea what this means, but I don't like the sound of it. Late
yesterday I did a clean boot on windows because I had to reinstall an mp3
player's software. I then did a reboot and everthing in my startup services
looked ok to me, but I wonder if I missed something there.

Can someone help, please? I'm running Home Premium.