Hello, I have the best 2013 15in retina MBP you can build. I also have the Nvida graphics. Since the day I got the laptop video playback has been kinda bad in Windows 7. Often video will freeze while audio continues. It happens at all video sizes and types. I even tried many different programs to try for better playback and I get the same results. Also Youtube videos do the same thing even when they are fully loaded. Is this normal when using windows on a Mac? My 4 year old HP laptop plays videos perfect even when the HP laptop is running background task. I never have a single problem. Anyone else have this issue? Any suggesting's as to what I could do to fix this? Thanks!