On three or more occasions this morning a warning message from Windows 10 has come up that Norton Security has stopped working and suggesting that I should close the program and let Windows look for a solution to the problem. At this point, the green tick on the \Norton icon on the task bar at the bottom of the screen has gone, although it is still there on the Norton icon on the bottom right of the screen (where the battery state and other states show). Clicking on either icon, brings the green tick back on on the task bar.
Is there a problem with Norton, or is there a problem with Windows 10? The last updates for Windows 10 were on the 14th of this month, and I have run Liveupdate twice this morning on Norton Security.