After Norton support used logmeinrescue to reinstall Norton 360 multiple times over almost a day I found the next day that many other packages had their preferences lost but more important is that I got the Autofix Attention message Error 3048, 3.
The button lead to a page asking me to use Intelligent Updater. This produced a message to check the log file "Log.IntelligentUpdater.txt" created in the user's temporary directory but I could find no such file.
Another problem I the reinstall ptoduced was that some of the notes in the recovered Identity Safe are corrupt.
The Norton Toolbar can delay over three seconds the starting IE8.
Vista Home Premium with SP2, Norton 360 20.4.0.40.