Environment
Novell ZENworks 11 Configuration Management Support Pack 1 - ZCM 11 SP1 Bundles
Situation
MSI Bundles fail when 'Grant administrator privilege to user during installation' is configured
ERROR: "An Unknown MSI error occurred: Error code is Unable to cast object of type 'System.Security.Principal.WindowsPrincipal' to type 'System.Security.Principal.GenericPrincipal'.."
Resolution
This is fixed in version 11.2 - see KB 7010044 "ZENworks Configuration Management 11.2 - update information and list of fixes" which can be found at https://www.novell.com/support