Hey I don't know what the issue is with uplay besides that it sucks as a down loader. But I have been trying to get the patch all morning off and on AND get he message that Uplay is unable to start your download. Check that you have an active internet connection (obviously I do or I wouldn't have been able to connect to put this message) and sufficient space on your hard drive (I do have the space) then try again.
All those requirements that are above I meet. I just would like to know what is going on with this.