I gave up norton years ago, it was slow, was a resource hog, ate up memory and just slowed the computer down, and even let virus in. McCaffee was same way a resource hog. I used avast for a long time but it went under alot of changes and went downhill. I now use microsoft security essentials and malwarebtes. Never had any issues since, other than a program I had to use to download music from youtube was caught by maleware bytes as bad so they must of changed something in the program to get flagged.