Ravenhawk

I have been searching for a solution to a problem for several days with no luck. The problem I am having is that during playback of a video file, the video will begin to lag behind with pauses while the audio continues normally. This only happens when the control display disappears. As log as I keep the control display visible the video plays normal. If the video starts to lag, the computer will begin to respond slow to commands if I wait to long it is a power cycle. If I can bring the controls back up after the lag has begun, the video will fast forward to catch up to the audio. This happens to both the internal player and MPC. I can play the video fine outside of RR using MPC. I can also embed MPC in a skin and it will play the video file. Anyone have any ideas as why this is happening? Is this a bug in RR?

Thanks
Ravenhawk