In short : I have upgraded a legit Windows 7 Ultimate today to Win10. Keep nothing . All ok. This Win7 had No MS account to log in. I am the only owner. After upgrade, I could boot with my old username without problem. Later, I want to try Cortana... Seems to be mandatory to have an MSA to use it. I could not get rid of the "offer" to create one. So I did make a new MSA. After installing some applications, I need to reboot...What a surprise ! At login My username disapeared and in place I see my MS Account and asking for pwd. Is there a way to log in as before ? Do I need to be all time connected to an MSA ? I don't care Onedrive, I manage my backup myself. It was just to play a while with cortana. Don't have a big use too. Is there a way to go back ? thanks for any advice.