Thank you David for your response. I followed your steps to enable the administrator account via MMC console window, Then I start cygwin bash shell either as an administrator or after I logon the administrator account. When I run ssh-host-config -y again, I got the same error message. It seems that enabling real administrator account does not help with this problem. Any more clues? Paul. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/