NIS 2012 not working

The NIS 2012 installed on a Sony Vaio platform with Windows 7 OS does not open.  I do not know if it is working but I can not open the program to perform a manual scan or update,  a pop up window states that it has a detected an error which tells me to click on a link to download a Norton Power Eraser.  I followed the instruction and after running the program,  my computer will not boot up properly.  I was able to fix the boot up problem using instructions from a different forum.  I downloaded a Power Eraser from the site this time and it works.  But  I still can not open NIS 2012.  I suspected that NIS 2012 files are corrupted so I decided to reinstall using the CD.  After un-installing Norton, all my programs disappeared.  My Start Up Menu was blank and the files were relocated.  I was able to restore my programs after several System Restore tries, but several files attributes were changed to hidden.  Some of them I do not have permission to access or change.  NIS 2012 still does not open, I cannot do a manual update and manual scan.