Red X Icon Windows XP PC

I've had Norton Security installed on this WinXP SP3 PC for several months with no problems.  When I powered it up this morning, the Norton icon in the system tray showed a red X.  I opened Norton Security looking for the problem but found none (see screen shot).

NortonRedX.jpg

I ran Live Update a couple times and rebooted the PC but the red X is still there.  How do I determine the problem?

NS version 22.5.4.24

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