When I went to edit a couple of my web pages with Notepad++, I couldn't save the file. Tried "administrator" to run it. I am not sure which thing worked, but I set the permissions to allow write access to all of my directories. Also, "read only" got checked for the diretorys (My Docs, Music, Pictures, etc.), and I fixed that.
I think that Win10 created a new user instead of reusing my old login ID, which has full administrator rights. It seems OK now.
Greg H.