I have this movie that I want to play. The problem is it won't start. When I double-click it, it simply says "cannot render this file." It's about 700mb long. I've tried to play it using media player ...

So I just installed Win7(64) and the Windows Media Player plays videos seemingly in slow motion and stutters. NVIDI GeForce 7900 GS. Downloaded latest drives and no change. Any ideas? Also the sound ...