Hello, I have WIN 7 - 64 bits with core2duo e5700 3Ghz, 4Go RAM, HDD 1To and ATI Mobilitiy Radeon HD5470 512Mo. But I have a bug problem to read HD video, i have a big deceleration but my CPU is not full. :( I have a problem with one video MKV in 1080p AC3 audio and one video 720p with DTS audio. I ...