diff --git a/ExplorerPatcher/GUI.c b/ExplorerPatcher/GUI.c
index 3e9e7b2..fb579d2 100644
--- a/ExplorerPatcher/GUI.c
+++ b/ExplorerPatcher/GUI.c
@@ -629,6 +629,10 @@ static BOOL GUI_Build(HDC hDC, HWND hwnd, POINT pt)
                                 &hKey,
                                 &dwDisposition
                             );
+                            if (hKey == NULL || hKey == INVALID_HANDLE_VALUE)
+                            {
+                                hKey = NULL;
+                            }
                             RegQueryValueExW(
                                 hKey,
                                 name,
@@ -651,6 +655,10 @@ static BOOL GUI_Build(HDC hDC, HWND hwnd, POINT pt)
                                 KEY_READ | (hDC ? 0 : KEY_WRITE),
                                 &hKey
                             );
+                            if (hKey == NULL || hKey == INVALID_HANDLE_VALUE)
+                            {
+                                hKey = NULL;
+                            }
                             value = hKey;
                         }
                         if (bInvert || bBool || bJustCheck)
@@ -744,6 +752,10 @@ static BOOL GUI_Build(HDC hDC, HWND hwnd, POINT pt)
                                         &hKey,
                                         &dwDisposition
                                     );
+                                    if (hKey == NULL || hKey == INVALID_HANDLE_VALUE)
+                                    {
+                                        hKey = NULL;
+                                    }
                                     if (d[1] == '"')
                                     {
                                         wchar_t* p = wcschr(d + 2, L'"');
@@ -1173,6 +1185,10 @@ __declspec(dllexport) int ZZGUI(HWND hWnd, HINSTANCE hInstance, LPSTR lpszCmdLin
         &hKey,
         &dwDisposition
     );
+    if (hKey == NULL || hKey == INVALID_HANDLE_VALUE)
+    {
+        hKey = NULL;
+    }
     DWORD bAllocConsole = FALSE;
     RegQueryValueExW(
         hKey,
diff --git a/ExplorerPatcher/SettingsMonitor.c b/ExplorerPatcher/SettingsMonitor.c
index dca4b27..7ab42e9 100644
--- a/ExplorerPatcher/SettingsMonitor.c
+++ b/ExplorerPatcher/SettingsMonitor.c
@@ -55,11 +55,20 @@ DWORD MonitorSettingsChanges(SettingsChangeParameters* params)
                 KEY_READ,
                 &hKeyCU
             );
+            if (hKeyCU == NULL || hKeyCU == INVALID_HANDLE_VALUE)
+            {
+                hKeyCU = NULL;
+            }
             if (lRes != ERROR_SUCCESS)
             {
                 return 0;
             }
             HANDLE hEvHKCU = CreateEvent(NULL, FALSE, FALSE, NULL);
+            if (hEvHKCU == NULL || hEvHKCU == INVALID_HANDLE_VALUE)
+            {
+                hEvHKCU = NULL;
+                return 0;
+            }
             RegNotifyChangeKeyValue(
                 hKeyCU,
                 FALSE,
@@ -75,11 +84,20 @@ DWORD MonitorSettingsChanges(SettingsChangeParameters* params)
                 KEY_READ,
                 &hKeyLM
             );
+            if (hKeyLM == NULL || hKeyLM == INVALID_HANDLE_VALUE)
+            {
+                hKeyLM = NULL;
+            }
             if (lRes != ERROR_SUCCESS)
             {
                 return 0;
             }
             HANDLE hEvHKLM = CreateEvent(NULL, FALSE, FALSE, NULL);
+            if (hEvHKLM == NULL || hEvHKLM == INVALID_HANDLE_VALUE)
+            {
+                hEvHKLM = NULL;
+                return 0;
+            }
             RegNotifyChangeKeyValue(
                 hKeyLM,
                 FALSE,
@@ -309,10 +327,10 @@ DWORD MonitorSettingsChanges(SettingsChangeParameters* params)
                 }
             }
 
-            CloseHandle(hEvHKCU);
-            CloseHandle(hEvHKLM);
-            RegCloseKey(hKeyCU);
-            RegCloseKey(hKeyLM);
+            if (hEvHKCU) CloseHandle(hEvHKCU);
+            if (hEvHKLM) CloseHandle(hEvHKLM);
+            if (hKeyCU) RegCloseKey(hKeyCU);
+            if (hKeyLM) RegCloseKey(hKeyLM);
         }
     }
 }
\ No newline at end of file
diff --git a/ExplorerPatcher/dllmain.c b/ExplorerPatcher/dllmain.c
index 5785836..60df375 100644
--- a/ExplorerPatcher/dllmain.c
+++ b/ExplorerPatcher/dllmain.c
@@ -1356,7 +1356,8 @@ __declspec(dllexport) DWORD WINAPI main(
     {
         funchook = funchook_create();
         printf("funchook create %d\n", funchook != 0);
-        HKEY hKey;
+
+        HKEY hKey = NULL;
         DWORD dwDisposition;
         DWORD dwSize = sizeof(DWORD);
 
@@ -1373,6 +1374,10 @@ __declspec(dllexport) DWORD WINAPI main(
             &hKey,
             &dwDisposition
         );
+        if (hKey == NULL || hKey == INVALID_HANDLE_VALUE)
+        {
+            hKey = NULL;
+        }
         DWORD bAllocConsole = FALSE;
         RegQueryValueExW(
             hKey,
@@ -1760,6 +1765,12 @@ __declspec(dllexport) DWORD WINAPI main(
         {
             printf("Failed to register taskbar update notification.\n");
         }
+
+
+        if (hKey)
+        {
+            RegCloseKey(hKey);
+        }
     }
     else
     {
diff --git a/ExplorerPatcher/symbols.c b/ExplorerPatcher/symbols.c
index 96ae80e..a0dbc72 100644
--- a/ExplorerPatcher/symbols.c
+++ b/ExplorerPatcher/symbols.c
@@ -59,7 +59,7 @@ L"</toast>\r\n";
 
 DWORD DownloadSymbols(DownloadSymbolsParams* params)
 {
-    HKEY hKey;
+    HKEY hKey = NULL;
     DWORD dwDisposition;
 
     HMODULE hModule = params->hModule;
@@ -224,7 +224,7 @@ DWORD DownloadSymbols(DownloadSymbolsParams* params)
         &hKey,
         &dwDisposition
     );
-    if (!hKey)
+    if (!hKey || hKey == INVALID_HANDLE_VALUE)
     {
         FreeLibraryAndExitThread(
             hModule,
@@ -296,7 +296,7 @@ DWORD DownloadSymbols(DownloadSymbolsParams* params)
         &(symbols_PTRS.twinui_pcshell_PTRS[7]),
         sizeof(DWORD)
     );
-    RegCloseKey(hKey);
+    if (hKey) RegCloseKey(hKey);
 
 
 
@@ -364,7 +364,7 @@ DWORD DownloadSymbols(DownloadSymbolsParams* params)
         &hKey,
         &dwDisposition
     );
-    if (!hKey)
+    if (!hKey || hKey == INVALID_HANDLE_VALUE)
     {
         FreeLibraryAndExitThread(
             hModule,
@@ -412,7 +412,7 @@ DWORD DownloadSymbols(DownloadSymbolsParams* params)
         &(symbols_PTRS.startdocked_PTRS[4]),
         sizeof(DWORD)
     );
-    RegCloseKey(hKey);
+    if (hKey) RegCloseKey(hKey);
 
 
 
@@ -430,7 +430,7 @@ DWORD DownloadSymbols(DownloadSymbolsParams* params)
         &hKey,
         &dwDisposition
     );
-    if (!hKey)
+    if (!hKey || hKey == INVALID_HANDLE_VALUE)
     {
         FreeLibraryAndExitThread(
             hModule,
@@ -446,7 +446,7 @@ DWORD DownloadSymbols(DownloadSymbolsParams* params)
         szReportedVersion,
         wcslen(szReportedVersion) * sizeof(TCHAR)
     );
-    RegCloseKey(hKey);
+    if (hKey) RegCloseKey(hKey);
 
 
     if (symbols_PTRS.twinui_pcshell_PTRS[0])
@@ -503,9 +503,9 @@ DWORD DownloadSymbols(DownloadSymbolsParams* params)
     exit(0);
 }
 
-BOOL LoadSymbols(symbols_addr* symbols_PTRS)
+BOOL LoadSymbols(symbols_addr* symbols_PTRS, HMODULE hModule)
 {
-    HKEY hKey;
+    HKEY hKey = NULL;
     DWORD dwDisposition;
     DWORD dwSize = sizeof(DWORD);
 
@@ -520,6 +520,14 @@ BOOL LoadSymbols(symbols_addr* symbols_PTRS)
         &hKey,
         &dwDisposition
     );
+    if (!hKey || hKey == INVALID_HANDLE_VALUE)
+    {
+        FreeLibraryAndExitThread(
+            hModule,
+            1
+        );
+        return 1;
+    }
     RegQueryValueExW(
         hKey,
         TEXT(TWINUI_PCSHELL_SB_0),
@@ -637,7 +645,7 @@ BOOL LoadSymbols(symbols_addr* symbols_PTRS)
         &(symbols_PTRS->startdocked_PTRS[4]),
         &dwSize
     );
-    RegCloseKey(hKey);
+    if (hKey) RegCloseKey(hKey);
 
     BOOL bNeedToDownload = FALSE;
     for (UINT i = 0; i < sizeof(symbols_addr) / sizeof(DWORD); ++i)