I know that right now, it lags a lot during playback. It skips about every 1-2 seconds. I was just wondering if its even possible to get it to play them, or if I should start looking into an HTPC build. I have tried playing .mkv with VLC player, as well as WMP classic with codecavc. Both didnt work. I have an IBM Lenovo X60 thats 1.8ghz with 2gb of ram. Im not sure about the video card, and im not at home with it. Its basically this setup up http://www.notebookreview.com/default.asp?newsID=2701 90gb hard drive as well, with about 8gb free if that even matters. I feel like if I could free up some of the ram (no idea how to do that), it would help, since it HAS played fine in the past for a min or so.