So i reset my PC and upgraded to Windows 10. I didn't have a password or any microsoft account link to the PC (besides logining in on websites.) I restarted my PC today and was prompt to type in a password. The username was my brothers email address. i couldn't log in any other way and there is only one account on the PC. He some how added his account to the PC after using the PC to control his Xbox ONE to watch netflix (he lost his controller) now i cant remove the account. Can anyone help?