diff --git a/internal/microsoftgdk/microsoftgdk_windows.go b/internal/microsoftgdk/microsoftgdk_windows.go
index 163417585..f364f1107 100644
--- a/internal/microsoftgdk/microsoftgdk_windows.go
+++ b/internal/microsoftgdk/microsoftgdk_windows.go
@@ -63,6 +63,8 @@ func IsXbox() bool {
 
 func MonitorResolution() (int, int) {
 	switch C.XSystemGetDeviceType() {
+	case _XSystemDeviceType_Unknown, _XSystemDeviceType_Pc:
+		return 1920, 1080
 	case _XSystemDeviceType_XboxOne, _XSystemDeviceType_XboxOneS:
 		return 1920, 1080
 	case _XSystemDeviceType_XboxScarlettLockhart:
@@ -70,31 +72,38 @@ func MonitorResolution() (int, int) {
 		return 2560, 1440
 	case _XSystemDeviceType_XboxOneX, _XSystemDeviceType_XboxOneXDevkit, _XSystemDeviceType_XboxScarlettAnaconda, _XSystemDeviceType_XboxScarlettDevkit:
 		// Series X
-		return 3840, 2160
+		fallthrough
 	default:
-		return 1920, 1080
+		// Forward compatibility.
+		return 3840, 2160
 	}
 }
 
 func D3D12DLLName() string {
 	switch C.XSystemGetDeviceType() {
+	case _XSystemDeviceType_Unknown, _XSystemDeviceType_Pc:
+		return ""
 	case _XSystemDeviceType_XboxOne, _XSystemDeviceType_XboxOneS, _XSystemDeviceType_XboxOneX, _XSystemDeviceType_XboxOneXDevkit:
 		return "d3d12_x.dll"
 	case _XSystemDeviceType_XboxScarlettLockhart, _XSystemDeviceType_XboxScarlettAnaconda, _XSystemDeviceType_XboxScarlettDevkit:
-		return "d3d12_xs.dll"
+		fallthrough
 	default:
-		return ""
+		// Forward compatibility.
+		return "d3d12_xs.dll"
 	}
 }
 
 func D3D12SDKVersion() uint32 {
 	switch C.XSystemGetDeviceType() {
+	case _XSystemDeviceType_Unknown, _XSystemDeviceType_Pc:
+		return 0
 	case _XSystemDeviceType_XboxOne, _XSystemDeviceType_XboxOneS, _XSystemDeviceType_XboxOneX, _XSystemDeviceType_XboxOneXDevkit:
 		return (1 << 16) | 10
 	case _XSystemDeviceType_XboxScarlettLockhart, _XSystemDeviceType_XboxScarlettAnaconda, _XSystemDeviceType_XboxScarlettDevkit:
-		return (2 << 16) | 4
+		fallthrough
 	default:
-		return 0
+		// Forward compatibility.
+		return (2 << 16) | 4
 	}
 }