I played around with MC21 or Mac on my Mac Mini (late 2011) for a few weeks and left it because I could not get the playback to be smooth. So I am back to the W7 version in bootcamp. Always worked like a dream, always had smooth video playback. Did too, when I went back, for about a week or so. Then last night, completely out of the blue, it was worse than under OSX. Some of the recent TV documentaries I had downloaded (HD resolution) would start playing with a stutter, then slow down even more (sound kept going fine) and a minute or so into playback the picture would just freeze. I tried lower resolution material. It was not so bad, but it was bad. Just watched an episode of the first series of West Wing again (great show). This is 640 material and it stuttered on every pan so badly it gave me a headache. I reinstalled. It made no difference. I promise I did not tinker with the PC ... the only thing I can think of that changed between good playback and bad one was an automated Windows update yesterday. What could be wrong?
