I have a Surface Pro 3 running Windows 10 and joined to a domain. The device has been working perfectly since I bought it, including the Windows 10 update. I just installed the 1/19/2016 update and I am now experiencing a login issue. I enter my username and password, the login screen flashes briefly and returns me to the welcome screen. I have used an alternative account and the same issue occurs. I have verified that the date and time are correct; i have tried both wired and wireless connections to the domain. I have searched for solutions but have not found any. I don't want to perform a hard reset . . . that would suck especially because the surface has been working great since day 1. thanks in advance for your help!