!CortanaUI in developer language would mean not using cortanaui heres where MS seems to agree with me : Code: - System - Provider [ Name] Microsoft-Windows-Immersive-Shell [ Guid] {315A8872-923E-4EA2-9889-33CD4754BF64} EventID 2484 Version 1 Level 2 Task 2400 Opcode 0 Keywords 0x2000000000000042 - TimeCreated [ SystemTime] 2014-10-03T15:06:22.914693200Z EventRecordID 563 Correlation - Execution [ ProcessID] 716 [ ThreadID] 5868 Channel Application Computer WIN-D7HVCUKVDAE - Security [ UserID] Goldenheaven - EventData PsmKey Microsoft.Cortana_1.2.0.0_x64__8wekyb3d8bbwe+CortanaUI