There's a "an error has occurred in your computer" windows error-box-impersonating adbanner flashing every now and then, usually from the bottom of a page. This is clearly illegal advertising meant to trick the user to click it, and will likely lead to a site that wants you to install some "helpful" "free" software to "fix" whatever problem they claim exist.
I just think it is some kind of adspam program instead.
I just think it is some kind of adspam program instead.