Basically it's like this: Hit "Play" in Uplay, game loads. There's the disclaimer, then the video logo, then the "connecting" animation. During this animation, usually without it even making a full cycle, the game hangs then crashes. The audio plays in the background but the video signal hangs.
I have RivaTuner Statistics Server enabled to see the PC stats, and they freeze too. I believe it may be something wrong when the game's .exe tries to communicate with the video driver. Still, my drivers are the latest (GeForce 378.92) and are installed clean.
It started behave like this after 1.6 landed. It works normally after, usually, two hangs. Sometimes it doesn't even hang at all and works well.
I didn't find the right solution from the internet.