I did not have any browsers open and I have the latest version of yahoo messenger installed. It popped up when I sat down at my pc a few minutes ago and touched my mouse.
so avast saved the day and since your java / flash / browser was updated the exploit would probably not have worked even if avast did not detect…unless it was very new and not patched
So im sitting here at my pc and opened up a instant message window with somebody on my yahoo messenger friends list and I type the message and hit send and BOOM I get the exact same warning again from avast.