Installed 4.0 and problems now

Well a few days ago i got an e-mail saying to upgrade to version 4.0, i started to install it, it said to restart my computer and so i did. All of a sudden my computer totaly screws up saying there has been a software failure and it needs to be repaired. the only way it could repair itself was to system restore.

 

Now, each time i turn my computer on, my Norton looks like this:

5063i3D67D79B78426FC4

 

 

WHAT IS GOING ON???

 

[edit: Clarified subject.]