Download Manager driving me crazy

Norton Download Manager is popping up on the screen any time it things the computer is idle-- so, most annoyingly, when my kids or I are watching something. It just says "Another download manager is currently running. Please wait for it to complete and try again."  I'm decently computer savvy, and I have done everything I can, and I can't explain why this is happening.  At other times, the full Norton screen pops up asking me to update to the Windows 10 version. I can't do this-- I don't have Windows 10 on this computer. I am so frustrated with this that I am close to uninstalling and deleting the program if I can't make it stop.  Please help. 

Dell Inspiron, Windows 7, Norton Security Suite.