I used to get that too. It's some other program you installed screwing with the visual basic run times. I'm can't remember what the actual app was, though.
Anyway, IIRC there's an option to cancel the install. Just keep canceling and eventually it gets the idea.
Thanks a lot for your advice Numsgil! It works!
But some times it really frustrating alas. For example, when I try to load previos simulation, this irritating pseudoinstallation agian popups, and I need to over do the same, cancelling all thing. Is there any possible way to fix that Visual Basic runtimes?