I run Kaspersky Total Security 2016. From what I read Windows Defender was supposed to work alongside existing AV installations as a periodic scan. I can enable it. But the next time I reboot it's disabled again and WD bitches and moans about not being enabled. I think I will just disable it entirely since it's not working as it should. Also I used to have a picture for my account login and it only shows on the task menu as a small icon now and if I sign out. It not longer shows on the startup lock screen. I just get an anonymous round image on the startup screen. Why is it Windows always breaks s**t at each upgrade cycle?