Nis Leaks in Trojan protection!

I always thought Nis was a good product. My brother has Nis on 3 computers. He started getting strange popups and asked 

me for advice. Nis 2013 found nothing on complete analyses. I started working on his computers and found Trojan in all

off his computers. That I removed my self. 

 

This is real bad and now I don't have any trust in NIS 2013.

 

I also see in the forum that many people has problem with Trojan.