Norton 360 stops working

I recently had a hard drive installed on my desktop PC.  System details are:

Windows 7 Home Premium Service Pack 1,

64-bit system,

Processor 3.10Ghz  with 10Gb of RAM

Every time I open Norton 360 main window, it stops working.  I can run Live Update and QuickScan with no (apparent) problems.

I have run Power Eraser and the Removal Tool; these have not resolved the issue with 360 stops working.

Suggestions on how to fix this? 

 

Thanks in advance.

Stephen