Selecting Settings makes NIS or computer unresponsive (version 20.1.1.2)

System Description: Laptop on AC power, Windows XP s.p. 3, Celeron 2.0 GHz, 512 MB RAM, Norton Internet Security Version 20.1.1.2

 

Problem: (too often but not every time) Open NIS, click on Settings, sometimes mouse cursor changes to pointing hand and NIS is unresponsive; either Settings never opens or it may open after a long, long time, and NIS remains unresponsive while I wait for Settings screen to open. If CPU has not shot up towards 100%, I seem to be able to Restart the computer and no other disturbance is found - although not yet taken opportunity to see how more NIS behaves.