help please, virus detected:risks in compressed files

is there some kind of problem with nis 2012 latest scanning engine?

 

everytime i scan it detected different kind of virus, however it did not state what is the virus name

 

only put risks in compressed files , often in those rar or msi files.

 

why is norton so buggy and problematic?

 

this nis 2012 looks like a piece of useless junk software