Novell ZENworks 10 Configuration Management with Support Pack 1 - 10.1
After some failures, zenworksuninstall may not set gina correctly. Can't log in to Windows.
This is fixed in version 10.1.1 - see KB 7001406 "ZENworks 10 Configuration Management 10.1.1" which can be found at https://www.novell.com/support
If the Novell client is not installed, use safe mode to remove the registry setting: