Norton Internet Security won't start after update

I updated a few days ago and since that moment, NIS won't start and doesn't show up in the task bar...

 

I uninstalled it from windows control pannel, reinstalled it, same issue.

 

Removed it again with the removal tool, several time, reinstalled, same issue.

 

I restored my system to the oldest restore point, repeated the above steps and still end up with the same result.

 

After forever, the following error message pops up:ErreurNorton.jpg



I'm running Windows 7 64 bits

 

Any known fix for that issue?