Had to uninstall NIS so I could connect to internet

I have had NIS for a couple years now. All of a sudden a few days ago my laptop would not connect to my home internet. My laptop was the only one in the house that had this problem, and I could connect to all other wifi in my area. After talking to my ISP and researching a little, I was recommended to uninstall NIS. Once I uninstalled, my internet connection began working fine again.

 

However, never before have I had a problem with Norton and I would like to reinstall the program. My concern is that if I reinstall, it will block my internet again. Will this happen and if it will, what settings can I use to avoid this problem?