Questions re: Fake App Attack: Fake AV 20

I use norton internet security in windows 7, 64 bit.  This has only happened on internet explorer, not chrome

 

On 2/2, while on orbitz, NIS popped up and said it blocked Fake App Attack: Fake AV site 20.  I ran a full system scan- no issues. 

 

happened again on 2/12 on the avclub website, same as above, different attacking computer/URL

 

happened again on today (2/25) on av club.  There were 3 attacks in a row before I was able to close out IE.  I have visited the site multiple times between 2/12 and 2/25.

 

I'm not sure what my next course of action should be.  I'm not sure if I have a malware problem on my computer or if it's a problem with the websites I visit.

 

Any advice will be appreciated.  My computer skills IQ is average to below average, and I dread having to go through some of that malware removal stuff I've read about in other posts, but obviously if there's a problem with my computer, I need to deal with it.

 

Thank You