Norton says STOP an error has occured

I was on the Internet when suddenly I received this ERROR! message from Norton.  Norton instructions requested I download new virus definitions depending on my operating system, which I did.  I then reran Norton quick scan.  Quick scan was aborted because of an error. 

 

Alternate instructions from Norton if new virus definitions didn't fix the error, requested I download and run Norton Eraser.  I did.  And Norton Eraser didn't run.  I received this error message from Norton Eraser: error.  0X80004005,0.

What is going on and what should I do?

 

BTW, I reran Norton quickscan after the Norton Eraser error  and received no errors...  That doesn't encourage me, though.