Hello there, ever since I reinstalled Norton Antivirus and started a new subscription, I have had something strange happening on my computer. I keep the screensaver set to go on after 3 minutes of inactivity, and then after the screensaver goes on, soon afterwards, maybe a few minutes or longer, the screensaver will go off and the desktop reappears, then 3 minutes later the screensaver goes on again, then off again after awhile, over and over. It started right after I installed Norton Antivirus, so I am pretty sure Norton Antivirus is doing something to deactivate the screensaver.