The most that I am doing is surfing on the web on mostly text based sites. I have watched movies - just the movie - and the artifacts have still persisted. I have the most recent graphics , sound , directx , Intel , blu-ray player firmware / software installed. The program is also the most recent (as I was given an updated version that wasn't showing up in the older version I was playing movies with).
I'm not entirely sure but it seems to always happen a little after fresh installing. I will watch a few movies after installing Windows but after taking a break and then watching movies again the artifacts just come out of nowhere.