Hi I have strange problem to set specific permission to a registry key. According to Microsoft's sample code, it should work like this: private static RegistryKey CreateRegistryKey(RegistryKey parentPath) { RegistryKey childKey = parentPath.CreateSubKey("myKey"); RegistryAccessRule rule = new RegistryAccessRule( new SecurityIdentifier(WellKnownSidType.AuthenticatedUserSid, null), RegistryRights.ReadKey | RegistryRights.Delete, InheritanceFlags.ContainerInherit, PropagationFlags.None, AccessControlType.Allow); RegistrySecurity childACL = childKey.GetAccessControl(); childACL.AddAccessRule(rule); ShowSecurity(childACL); childKey.SetAccessControl(childACL); return childKey; }As I expected But if the code is executed in a windows service, I missing my permission!? How can this be? Am I doing something wrong? Have I overlooked something?