Exception Cannot Continue-Automatic Computer Shutdown

Good day.  I am new to the forum.  I could not find any specific rules wrt posting, so kindly alert me to any mistakes in posting queries.  I am requesting help with the following:

I am running Norton 360 on a Sony VAIO laptop.  My browser is the current version of Firefox (39.0). About one month ago, I started seeing messages that started with "The exception cannot continue".  There would be a bunch of numbers after that and then a statement to the effect "Click to terminate".  Before I could even read the entire message or write down the numbers in the message, my computer would immediately shut off.  This became more frequent, so I contacted Norton Support.  They ran Norton Power Eraser for me and found no viruses.

One month later, it is happening again.  Now, I barely have time to even view the message when my computer immediately shuts down.  Upon rebooting, I run Norton 360.  Sometimes, an error will be found and the problem is corrected.  This past week, the "exception" message is now occurring daily.  What is an "exception"?  What can I do on my end to stop this from happening?

Thank you in advance for your time and consideration of the above.  I'm not a total airhead when it comes to computers, but when it comes to things like this, I am a novice.