The Thing About the black screen is, the explorer.exe process hangs or doesnt start, you can have to create a new process and type "explorer" it should fix it or you can just wait for the process to start up incase the process is on if not then manually start it by making a new task, the windows defender problem is also a random one, it will work sometimes, there is another problem the audio functions dont startup along with windows so you have to manually start them from the audio logo itself or from "services.msc"