Cannot log in back after screen saver locked the computer

Hi there,
We have a domain environment with Windows 2012 R2 and a Windows 2003 domain controllers and Windows XP and Windows 7 clients. We have setup a GPO for screen saver which lock the computer after 15 minutes idle. In the last few weeks on some Windows 7 computers
after the screen saver locked the computer the users cannot log in back. Error message come up with Username or password is incorrect.
I've tried to reach the computer through RDP but same error came up even tried to log in as domain admin. I could log in as domain admin locally (switch user option) but as a user cannot. I've tried to restart Netlogon, Workstation and Server services but
nothing happened. In the event viewer no related error message. The only way to login back as a user to restart the computer. It is not really good solution as they opened lots of things which wasn't saved.
Anyone has any idea or experience to solve this issue?
Many thanks
AM

I could log in as domain admin locally (switch user option) but as a user cannot. I've tried to restart Netlogon, Workstation and Server services but nothing happened. In the event viewer no related error message. The only way to login back as a user
to restart the computer. It is not really good solution as they opened lots of things which wasn't saved.
Hi,
Since you could login with Domain Admin locally, it should didn't have problem with Netlogon service and other logon correspond service. It seems like the account itself problem.
When this problem occures, have you tried to use other computer logon with the problematic account for test? If other normal computer also had same problem when using the account. It's should your Server authenticate problem. If not, it maybe the domain
account profile problem, you can try to remove the account and readded it for test.
If there was any updates, please feel free let us know.
Roger Lu
TechNet Community Support

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