Sounds like you picked up some annoying spyware. It's not coming from the 9:30 site.
Download, install and then run
this program. It's free, takes up very little space and is easy to use. Best yet, those little bastards will be gone.
On a more advanced level, if you know what site it's coming from, go into your Advanced/Security/Restricted sites buttons and put a block on that site.