I have purchased a new Windows 10 Home PC and then purchased and installed the Pro upgrade. I was then able to add the computer to the 2008 R2 domain (exampledomainname.com) For some reason I can not login to the PC with any domain accounts. I have tried using the firstname.lastname@example.org with password and exampledomainname\username with password. It just keeps telling me that the username or password is incorrect. I have also tried adding the account under add work account in the settings. I have no other issues logging in from any other machines in the domain.