The problem that Symantec ASSUMES that it can be restored from the Restore Desktop Gadget installed with Windows Applet or else by merely going to Gadget add. They do not anticipate that the gadget may have gone away because the Window Sidebar folder that contains "Norton Gadget" folder is an empty Norton Gadget folder.
They do not tell you or perhaps do not know that the Norton Gadget Folder also appears in the program files or in my x64 Windows 7 in C:\Program Files (x86)\Norton Internet Security\Engine64\18.5.0.125\gadgets
The way to fix this problem, then is to first enter Safe Mode and copy the above folder into C:\Program Files\Windows Sidebar\Gadgets.
Walla, the problem is fixed when you go to the Gadgets and double click to install the gadget.