diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index 032eb08..94796a8 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -55,6 +55,7 @@ docx-rs = "0.4"
 windows = { version = "0.58", features = [
     "Win32_Media_Audio",          # WASAPI (Phase 1)
     "Win32_Graphics_Dxgi",        # GPU enumeration (Phase 3)
+    "Win32_Devices_DeviceAndDriverInstallation",  # SetupAPI: NPU detection (Phase 3, T3.4)
     "Win32_System_Com",
     "Win32_UI_Shell",             # SetCurrentProcessExplicitAppUserModelID (Phase 8, T8.6)
     "UI_Notifications",           # scheduled toast reminders (Phase 8, T8.6, FR-CAL-5) — the