if you've ever streamed a movie or anything like that with divx, open up chrome or firefox or whatever you use, go pick a video (I have this one bookmarked
http://www.vidxden.com/x24ugljah7b9), start playing it and turn the volume down then start EQ.
it's a dual core problem and I tried every fix involving wineq and affinities and adjusting startup location and all that, and this is the only thing, weirdly enough, that works 100% of the time.