Here's another record from Ubisoft, the cleverness of their support. This is the way to solve all the login connection problem so many suffered recently:
"To resolve you issue could you please uninstall the Uplay launcher from your PC.
Could you please go to http://uplay.ubi.com/en-GB
and click on the link to download and then reinstall the launcher.
Once the Uplay client is reinstalled please do the following:-
Go to the following location - C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher
- Right click Uplay.exe
- Select properties
- Switch to the compatibility tab and tick run this program as an administrator.
- Click Apply and then OK.
Once you have done this please try to run the game again."
-- just to make sure, yes, it was ironic