I have a windows 8 PC that I upgraded to windows 10 and I reset it. After I reset it, it automatically set an unactivated version of windows 10 home as my default operating system instead of the normal windows 8. Every couple hours or so, my entire screen will turn blue and tell me to activate windows with a "go to settings" button. I click the button and it will open up the settings app but after about 3 seconds, it will automatically close. If I try to activate it manually, it does the same thing. What should I do?