Patch 2 for PC is live! Connect to Uplay or Steam to start downloading.
Please follow our Assassin's Creed Live Updates Blog for more information on this and upcoming updates.

This patch reduces the occurrence of the following issues:
Full details on the Patch Notes can be found on the Steam Forums HERE.
Note that even with this patch, players may still experience:
We are continuously working to fix remaining issues and we’ll continue to keep you up to date. Make sure to check our full Known Issues Thread to keep track of latest updates in the meantime.
If you’re having problems that aren’t included here, please report them by contacting Ubisoft Customer Support.
-The Live Updates Team