Serious problem, please help

[shibby2]

Something started to happen today on my forum. Whenever someone would go to any search pages (newest posts, search, search members posts, etc), it would redirect to some "anti-virus" software page. So obviously I was compromised somehow.

Now, it won't redirect to that anymore, but whenever I access any of those pages still, all the images on the page come up as broken (red X's).

Anyone know how or why this is happening, and how to fix it?

Any help is greatly appreciated, thanks!