I've decided not to renew my Zone Alarm Extreme Security Suite due to recurring problems. I want to use Windows Defender, but clicking on the app on start page, I get a message "Windows Defender has been turned off and isn't monitoring your computer." However, I can't find a way to turn it on! Can anyone help, please.
In windows 7 (not sure if same in W8.1). Start, Control Panel, Windows Defender. You can select "Click here to turn it on" but as has been said if another A/V is in use, it will say so. I agree with onthelimit1 but would go for either Avast or Avira , in that order. (Get them from - one only :