Wrong number of arguments or invalid property assignment error

I was about to add another account, but I can’t open the User Account on my control panel. I can’t get in since it’s giving me an error message, Wrong number of arguments or invalid property assignment.
I can click on the other icon there, except for this one. I’m using Windows XP Pro. I don’t remember modifying or anything on my computer before this.
Some time when I was trying to open it, no error will appear.
I just click, wait and then nothing.

What can I do to fix this?
