Norton AntiVirus is easy to install and runs seamlessly in the background on my PC. Every year I upgrade to the latest version and have never had a problem with a virus. I purchased the CD_ROM version and installation was very straight forward. Purchased online from Platinum Micro via Rakuten and service was outstanding and the price unbeatable. Great customer support from Platinum Micro.
The new versions come with some programs I'm not familiar with but tweaking them in settings is very easy and if you don't need them they're easy to disable. This antivirus has come a long way from just a few years ago, I've always been a fan but I really feel protected against any unwanted intrusions with the new version.