I have been having trouble using Norton since Windows 10 was installed. When I turn on Norton, the screen goes black and I have to restart the computer for Windows to work. I have a second laptop. In the second laptop, Windows 10 defender is turned off and Norton works perfectly. The problem is that in the laptop I can not find a way to turn off Windows Defender or to make both windows Defender and Norton work together. Anybody has had this problem?