My C# winform application fails to get the (local machine's) user account names when installed on a 64bit Windows 7 machine. It works correctly on 32bit Windows 7, 64bit VIsta, 32 bit Vista and XP. The code fails on the line "DirectoryEntry admGroup = localMachine.Children.Find..." with the error "System.Runtime.InteropServices.COMException [0x800708ac]. [...] read more