That's weird, I use Avast and it it never triggers on that site, but it's probably from the pop ups, I have most of those blocked in my hosts file. Whenever it does try to pop one up it just goes to a blank page with no content. Sometimes they make new ones so whenever one gets through I just note the xxx.com and block all content from there by adding it to the hosts file with the 127.0.0.1 assignment.
Still works in win 7, but it's a little tricky to get permission.