Recently we have started to use SmartCards in our organization. We are using Windows 7 Enterprise SP1. We have found on some machines where when the computer is locked (for ex. after a pre-defined screen saver lockout), the user cannot use the keyboard or mouse to click anywhere on the screen or type in a password. It is as if there is nothing connected. I have found that if I remotely kill the LogonUI process on that machine from a remote machine, then the logon screen becomes unfrozen and I am able to login again. Otherwise, I need to hard reset the machine. If I disconnect my SmartCard but leave the reader itself plugged in to the PC, this almost never (if ever) happens. Could there be some correlation here or some setting that is causing this problem? Thanks, Reuvy

Hi Reuvy, It seemed the issue occurs when using SmartCard to login. The LogonUI process (system) collects the PIN. Smart card logon flow in Windows Vista and Windows 7 http://msdn.microsoft.com/en-us/library/ff404289(WS.10).aspx SmartCard certificates for logging on to the network must be issued by a trusted enterprise CA. Therefore, it is better to contact Windows Server Forum to get more professional support. Windows Server Forum http://social.technet.microsoft.com/Forums/en-US/category/windowsserver From Windows 7 side, please update all your devices' driver from manufacture's site for testing. Best Regards, Niki Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

I have moved this to the server forums, but no answer yet, nor any direction provided either. http://social.technet.microsoft.com/Forums/en-US/winserversecurity/thread/66f3d55e-60eb-413e-b92b-d16734f3d9c5