If all else fails call 919 460 9778 for tech support from uplay; works for me with my minimal computer skills.
PSS: my game SHV totally fried on me after 1 year. I just reloaded it yesterday and uplay has added upgrades for bugs that were not in evidence on the previous download. Try reloading the game again. Part of my problem is that I don't have the optimal video card with my windows 7 newer computer. AT the same time I had eliminated all uplay and also reupped that as well ...so far so good today.