So, just about 5 minutes ago, I'm surfin' through Philosophy when BAM! it takes me to this brand new web page that says "Darkforum" on the top but isn't darkforum, then immediately begins to download something, but it's happening so fast I can't stop it nor figure out what exactly it is, then when it tries to install I get an "Error" message that closes my explorer. Then, when I re-open explorer all of my cookies are gone.

Theories?