I updated an older laptop from W7 to W10. I used the media creator and the update was smooth and uneventful. As part of my explorations I decided to remove all the metro apps using Get-AppxPackage | Remove-AppxPackage because I never use them Don't know if this has anything to do with it but I notice that Windows Defender is not running and its settings are grayed out. Can't change them. See attached images. And when I tried to download Windows Defender, a popup appears asking me to register my windows or enter the registration key. This is an upgrade from a legit Windows 7 that used to run Defender. How do I reinstall Defender? Where do I find the registration number it wants? Why do I need to "purchase" it? Thanks.