I've ran AVG For years and never had an issue (Well but then i know what i'm dong haha) but it has saved a few of my clients because that is what we put on unless they want something else.
If you do go with AVG this will save you some time
http
/free.avg.com/us-en/download-free-all-product
Download the x32 or x64 depending on what you are running. These are the full files not the download install. Its nice to have these and hard to find it. Plug the AVG website does everything they can to get you to buy it.
Once you install it do this. Open the AVG UI. Then in the upper right click on Options and then Advanced settings. On this page there is the System Tray Notifications. Uncheck the top one "Display System Tray Notifications"...