Unable to install NIS 2012 due to some leftovers of AVG

Hi there,

 

I am trying to install NIS 2012 on my machine but I am unable to do that due to some leftovers of AVG (free version) which I installed to remove some virus (as suggested by some friend) though I was using Norton 360 before that. But now I try to uninstall it but it is not removed completely as the error message appears while installing NIS 2012. Please help me in this regards. I have installed MS Security Essenstials meanwhile to stay protected but that is temporary as I want to install NIS 2012.

I have run Norton removal tool but this only removed Norton 360 but can't do anything with leftovers of AVG.