From f56c949305ec9a0e41578932dbbdf1dd5a0f4caf Mon Sep 17 00:00:00 2001
From: Xenius97 <freejanos@gmail.com>
Date: Wed, 12 Nov 2025 21:12:10 +0100
Subject: [PATCH 1/3] Skip antivirus warning when running under Wine

---
 Client/loader/Main.cpp | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/Client/loader/Main.cpp b/Client/loader/Main.cpp
index 5badcebb16..f24b3f9fb4 100644
--- a/Client/loader/Main.cpp
+++ b/Client/loader/Main.cpp
@@ -259,8 +259,17 @@ MTAEXPORT int DoWinMain(HINSTANCE hLauncherInstance, MAYBE_UNUSED HINSTANCE hPre
     // Make sure GTA is not running
     HandleIfGTAIsAlreadyRunning();
 
-    // Maybe warn user if no anti-virus running
-    CheckAntiVirusStatus();
+    // Maybe warn user if no anti-virus running (skip under Wine)
+    HKEY hKey = nullptr;
+    if (RegOpenKeyExA(HKEY_CURRENT_USER, "Software\\Wine", 0, KEY_READ, &hKey) != ERROR_SUCCESS &&
+        RegOpenKeyExA(HKEY_LOCAL_MACHINE, "Software\\Wine", 0, KEY_READ, &hKey) != ERROR_SUCCESS)
+    {
+        CheckAntiVirusStatus();
+    }
+    else
+    {
+        RegCloseKey(hKey);
+    }
 
     // Ensure logo is showing
     ShowSplash(hInstanceToUse);

From 2aca385af18ec0d92ccce35100aadde0806e25e7 Mon Sep 17 00:00:00 2001
From: Xenius97 <freejanos@gmail.com>
Date: Wed, 12 Nov 2025 23:38:53 +0100
Subject: [PATCH 2/3] Better code & detection

---
 Client/loader/Main.cpp          | 13 ++-----------
 Client/loader/MainFunctions.cpp | 24 ++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 11 deletions(-)

diff --git a/Client/loader/Main.cpp b/Client/loader/Main.cpp
index f24b3f9fb4..5badcebb16 100644
--- a/Client/loader/Main.cpp
+++ b/Client/loader/Main.cpp
@@ -259,17 +259,8 @@ MTAEXPORT int DoWinMain(HINSTANCE hLauncherInstance, MAYBE_UNUSED HINSTANCE hPre
     // Make sure GTA is not running
     HandleIfGTAIsAlreadyRunning();
 
-    // Maybe warn user if no anti-virus running (skip under Wine)
-    HKEY hKey = nullptr;
-    if (RegOpenKeyExA(HKEY_CURRENT_USER, "Software\\Wine", 0, KEY_READ, &hKey) != ERROR_SUCCESS &&
-        RegOpenKeyExA(HKEY_LOCAL_MACHINE, "Software\\Wine", 0, KEY_READ, &hKey) != ERROR_SUCCESS)
-    {
-        CheckAntiVirusStatus();
-    }
-    else
-    {
-        RegCloseKey(hKey);
-    }
+    // Maybe warn user if no anti-virus running
+    CheckAntiVirusStatus();
 
     // Ensure logo is showing
     ShowSplash(hInstanceToUse);
diff --git a/Client/loader/MainFunctions.cpp b/Client/loader/MainFunctions.cpp
index abd523dfc6..8ddb9cf692 100644
--- a/Client/loader/MainFunctions.cpp
+++ b/Client/loader/MainFunctions.cpp
@@ -21,6 +21,8 @@
 #include <iterator>
 #include <optional>
 #include <locale.h>
+#include <windows.h>
+#include <stdio.h>
 
 // Function must be at the start to fix odd compile error (Didn't happen locally but does in build server)
 namespace
@@ -938,6 +940,22 @@ void ValidateGTAPath()
     }
 }
 
+int isUsingWine()
+{
+    HMODULE ntdll = GetModuleHandleA("ntdll.dll");
+    if (!ntdll)
+        return 0;            // Not ntdll? Not Wine.
+
+    // Check for Wine-specific function
+    FARPROC wineVersion = GetProcAddress(ntdll, "wine_get_version");
+    if (wineVersion)
+    {
+        return 1;            // Is Wine.
+    }
+
+    return 0;            // Not Wine.
+}
+
 //////////////////////////////////////////////////////////
 //
 // CheckAntiVirusStatus
@@ -947,6 +965,12 @@ void ValidateGTAPath()
 //////////////////////////////////////////////////////////
 void CheckAntiVirusStatus()
 {
+    if (isUsingWine())
+    {
+        WriteDebugEvent("Skipping AV check under Wine");
+        return;
+    }
+
     std::vector<SString> enabledList, disabledList;
     GetWMIAntiVirusStatus(enabledList, disabledList);
 

From 55bbaac1f14bb6a86bc95dc63614a116de4e8c16 Mon Sep 17 00:00:00 2001
From: Xenius97 <freejanos@gmail.com>
Date: Wed, 12 Nov 2025 23:40:06 +0100
Subject: [PATCH 3/3] Add comment

---
 Client/loader/MainFunctions.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Client/loader/MainFunctions.cpp b/Client/loader/MainFunctions.cpp
index 8ddb9cf692..1262e2ba5b 100644
--- a/Client/loader/MainFunctions.cpp
+++ b/Client/loader/MainFunctions.cpp
@@ -940,6 +940,13 @@ void ValidateGTAPath()
     }
 }
 
+//////////////////////////////////////////////////////////
+//
+// isUsingWine
+//
+// Detect if we are running under Wine
+// 
+//////////////////////////////////////////////////////////
 int isUsingWine()
 {
     HMODULE ntdll = GetModuleHandleA("ntdll.dll");