After installing Windows 10 Creators Update, I have noticed that Windows Defender had turned itself on even though I already had Norton running. In the past, Windows Defender will turn itself off once it had detected a working copy of an antivirus program so I would just leave it at that and now when I clicked on the little Windows Defender icon, it actually brought up the Windows Defender Security Center and no option to turn it off. Tried as I might, I could not find a way to get rid of it. Appreciated if anyone has any tip on how to remove that. Thanks.