Can someone explain this???

Hello all.  I was wondering if anyone could tell me what this means. . .

 

 

[IMG]http://i1066.photobucket.com/albums/u413/Edward_Forbes/norton2.gif[/IMG]

 

I get it all the time when I go to this forum.  I can't get an answer from the company that runs the forums and one other person not related to the company replied and said my problem is Norton(that it is a terrible program, which I do not believe).  Should I be worried about this considering that it is marked as "high" severity?  Thanks for any info.

 

 

---Doug F