I've installed XBMC but only one MKV is playing correctly so far. The other 4 I've created are all stuttering terribly (maybe 15 FPS) if I turn off video acceleration, which I had to do to eliminate a pulsing macroblocking. I transferred a couple to my 2TB external drive and plugged it into my 4 year old i3 laptop and they're playing flawlessly. I'm really hoping someone out there has been successfully with this on their SP2 as I've spent way too much time researching this issue and trying to find a solution... to no avail. I have a 512GB unit, which should be more than capable of doing this. I understand (based on my research) that the Intel graphics card can be iffy, but all the works-around have failed for me, too. Please help!