In order to fully troubleshoot the problem that you are having, please try the steps below:
1. Run the Uplay PC client as an administrator.
Navigate to the Uplay executable file on the hard drive.
C:Program Files (x86)UbisoftUbisoft Game Launcher
Right-click on the executable file and select to Run as Administrator.
2. Install Windows Updates:
Click on the Windows Start button and go to All Programs --> Windows Update. In the left pane, click 'Check for updates' and if any are found choose 'Install updates.' You can find more information on Windows updates here.
3. Make sure the drivers for your video card, sound card, motherboard and processor are up-to-date. Running 2 cards in SLI or running 2 screens can also cause issues. Deactivate SLI or unplug any additional screens you may be using. If you are overclocking, try running at the stock clock settings.
4. Clearing your temporary files:
Go to the Start menu on your Desktop. Press the Windows key and the letter R at the same time.
Type in %TEMP% and press Enter.
Select All (Edit > Select All or Ctrl+A).
Click the Delete key.
Note: If you are using Windows 7, you will need to press Ctrl + A together to highlight the files. Once the files are highlighted, you will need to press the Delete key.
5. Disabling your background applications:
Go to the Start menu on your Desktop. Press the Windows key and the letter R at the same time.
Type in MSCONFIG and press Enter.
Uncheck the Load Startup items box, then select the Services tab.
Check Hide all Microsoft services, then click the option to Disable All.
Press Apply, then Close and pick the option to Restart.
Try running the game again. If the game loads and seems to be working, the problem is most likely related to one or more programs you have scheduled to load with Windows. You can then revert the settings back the way they were, and disable programs in a trial and error fashion using the startup tab in the MSCONFIG utility to try to find the culprit.
Note: Keep in mind that this is a temporary solution, and any changes can be reverted by returning to the MSCONFIG utility and re-selecting 'Normal Startup'.
If you are still having issues running the game, please submit your msinfo32 and dxdiag system files by following the steps here.
Once received, we will examine your system info and get back to you as soon as we can with a possible solution to your problem.