mysterious shortcut

I noticed a Norton shortcut mysteriously appear on my desktop so I clicked it.

 

The Norton tray icon disappeared but when it came back the tool bar is now working with FF3.5.2

 

Bad news is I saw it on the kids' PCs and deleted the shortcut as it would confuse them.

 

I have done a live update on my son's but can't get the toolbar.

 

What did the shortcut point to?

 

I'm a new user to Norton. Should I warn the kids to expect more mysterious shortcuts?

 

Ian