Default to Vulkan on Win10+ (previously Win11+). Set UI scaling default to -1 on all desktops.

Common/OSVersion.cpp

@@ -109,6 +109,10 @@ bool IsWin8OrHigher() {
 	return DoesVersionMatchWindows(6, 2, 0, 0, 0, true);
 }
 
+bool IsWin10OrHigher() {
+	return DoesVersionMatchWindows(10, 0, 0, 0, 0, true);
+}
+
 bool IsWin11OrHigher() {
 	return DoesVersionMatchWindows(10, 0, 0, 0, 22000, true);
 }

Common/OSVersion.h

@@ -8,6 +8,7 @@
 bool IsVistaOrHigher();
 bool IsWin7OrHigher();
 bool IsWin8OrHigher();
+bool IsWin10OrHigher();
 bool IsWin11OrHigher();
 bool DoesVersionMatchWindows(uint32_t major, uint32_t minor, uint32_t spMajor, uint32_t spMinor, uint32_t build, bool acceptGreater);
 bool GetVersionFromKernel32(uint32_t& major, uint32_t& minor, uint32_t& build);

Core/Config.cpp

@@ -211,7 +211,7 @@ static float DefaultUISaturation() {
 }
 
 static int DefaultUIScaleFactor() {
-#if PPSSPP_PLATFORM(WINDOWS)
+#if PPSSPP_PLATFORM(WINDOWS) || PPSSPP_PLATFORM(LINUX) || PPSSPP_PLATFORM(MAC)
 	return -1;
 #else
 	return 0;
@@ -456,8 +456,8 @@ static int DefaultGPUBackend() {
 	}
 
 #if PPSSPP_PLATFORM(WINDOWS)
-	// On Win11, there's a good chance Vulkan will work by default.
-	if (IsWin11OrHigher()) {
+	// On Win10, there's a good chance Vulkan will work by default.
+	if (IsWin10OrHigher()) {
 		return (int)GPUBackend::VULKAN;
 	}
 	// On older Windows, to be safe, use Direct3D 11.