Compressed file scanning under NIS '11

Interesting.

 

I noticed that with NIS 2010 and 2011 that my .rar and .zip files, when downloaded, do not have a Norton box popping up telling me that they are safe. However, when I download a .exe file, I am notified that it is "ok." Then how does the compresssed file scan work? On download or just during a right click to scan that compressed file?

 

Thx again, Jon.,