Gilco2: it was still on the one I built for friends using windows 8 Pro then upgrading to Windows 8.1. I know I was able to set it up so you didnt have to type password to login. I cant to my tablet to check right now. But have you right clicked on the taskbar and checked in there as there are many options there as well with Windows 8.1
I suspect that the linking off account to hotmail disabled the auto-log on, i.e. if you set auto-login, then upgrade but don't link, the setting is preserved?