diff --git a/3rdParty/Storm/Source/storm.cpp b/3rdParty/Storm/Source/storm.cpp
index 67bf57fb3..d3968164d 100644
--- a/3rdParty/Storm/Source/storm.cpp
+++ b/3rdParty/Storm/Source/storm.cpp
@@ -248,3 +248,4 @@ BOOL __stdcall SDlgKillTimer(int a1, int a2) rBool;
 BOOL __stdcall SDlgDrawBitmap(HWND hWnd, int a2, int a3, int a4, int a5, int a6, int a7) rBool;
 BOOL __stdcall SDlgDialogBoxParam(HINSTANCE hInst, char *szDialog, int a3, WNDPROC func, int a5) rBool;
 BOOL __stdcall SGdiTextOut(void *pBuffer, int x, int y, int mask, char *str, int len) rBool;
+BOOL __stdcall SFileEnableDirectAccess(BOOL enable) rBool;
diff --git a/3rdParty/Storm/Source/storm.def b/3rdParty/Storm/Source/storm.def
index 180910df6..6631907cf 100644
--- a/3rdParty/Storm/Source/storm.def
+++ b/3rdParty/Storm/Source/storm.def
@@ -88,7 +88,7 @@ EXPORTS
   SFileDdaInitialize            @260 NONAME
   SFileDdaSetVolume             @261 NONAME
   SFileDestroy                  @262 NONAME
-  ;SFileEnableDirectAccess       @263 NONAME
+  SFileEnableDirectAccess       @263 NONAME
   SFileGetFileArchive           @264 NONAME
   SFileGetFileSize              @265 NONAME
   SFileOpenArchive              @266 NONAME
diff --git a/3rdParty/Storm/Source/storm.h b/3rdParty/Storm/Source/storm.h
index b3f674285..562a258fc 100644
--- a/3rdParty/Storm/Source/storm.h
+++ b/3rdParty/Storm/Source/storm.h
@@ -1310,6 +1310,7 @@ BOOL __stdcall SDlgKillTimer(int a1, int a2);
 BOOL __stdcall SDlgDrawBitmap(HWND hWnd, int a2, int a3, int a4, int a5, int a6, int a7);
 BOOL __stdcall SDlgDialogBoxParam(HINSTANCE hInst, char *szDialog, int a3, WNDPROC func, int a5);
 BOOL __stdcall SGdiTextOut(void *pBuffer, int x, int y, int mask, char *str, int len);
+BOOL __stdcall SFileEnableDirectAccess(BOOL enable);
 
 #ifdef __GNUC__
 }
diff --git a/3rdParty/Storm/Source/storm_gcc.def b/3rdParty/Storm/Source/storm_gcc.def
index 7ea69c10b..387477a99 100644
--- a/3rdParty/Storm/Source/storm_gcc.def
+++ b/3rdParty/Storm/Source/storm_gcc.def
@@ -127,7 +127,8 @@ EXPORTS
   SFileDdaSetVolume             @261 NONAME
   SFileDdaSetVolume@12          @261 NONAME
   SFileDestroy                  @262 NONAME
-  ;SFileEnableDirectAccess       @263 NONAME
+  SFileEnableDirectAccess       @263 NONAME
+  SFileEnableDirectAccess@4     @263 NONAME
   SFileGetFileArchive           @264 NONAME
   SFileGetFileArchive@8         @264 NONAME
   SFileGetFileSize              @265 NONAME
diff --git a/Source/diablo.cpp b/Source/diablo.cpp
index 941d95959..f691aca13 100644
--- a/Source/diablo.cpp
+++ b/Source/diablo.cpp
@@ -254,71 +254,81 @@ void __cdecl free_game()
 	FreeGameMem();
 }
 
-bool __cdecl diablo_get_not_running()
+BOOL __cdecl diablo_get_not_running()
 {
 	SetLastError(0);
 	CreateEvent(NULL, FALSE, FALSE, "DiabloEvent");
 	return GetLastError() != ERROR_ALREADY_EXISTS;
 }
 
-int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
+int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
 {
-	HINSTANCE v4;       // esi
-	char Filename[260]; // [esp+8h] [ebp-10Ch]
-	char value_name[8]; // [esp+10Ch] [ebp-8h]
+	HINSTANCE hInst;
+	int nData;
+	char szFileName[MAX_PATH];
 
-	v4 = hInstance;
+	hInst = hInstance;
 #ifndef DEBUGGER
 	diablo_reload_process(hInstance);
 #endif
-	ghInst = v4;
-	if (RestrictedTest())
+	ghInst = hInst;
+
+	if(RestrictedTest())
 		ErrOkDlg(IDD_DIALOG10, 0, "C:\\Src\\Diablo\\Source\\DIABLO.CPP", 877);
-	if (ReadOnlyTest()) {
-		if (!GetModuleFileName(ghInst, Filename, 0x104u))
-			*Filename = '\0';
-		DirErrorDlg(Filename);
+	if(ReadOnlyTest()) {
+		if(!GetModuleFileName(ghInst, szFileName, sizeof(szFileName)))
+			szFileName[0] = '\0';
+		DirErrorDlg(szFileName);
 	}
+
 	ShowCursor(FALSE);
 	srand(GetTickCount());
 	InitHash();
 	exception_get_filter();
-	if (!diablo_find_window("DIABLO") && diablo_get_not_running()) {
+
+	BOOL bNoEvent = diablo_get_not_running();
+	if(!diablo_find_window("DIABLO") && bNoEvent) {
+#ifdef _DEBUG
+		SFileEnableDirectAccess(TRUE);
+#endif
 		diablo_init_screen();
 		diablo_parse_flags(lpCmdLine);
 		init_create_window(nCmdShow);
 		sound_init();
 		UiInitialize();
+
 #ifdef _DEBUG
-		if (showintrodebug)
-			play_movie("gendata\\logo.smk", 1);
-#else
-		play_movie("gendata\\logo.smk", 1);
+		if(showintrodebug)
 #endif
-		strcpy(value_name, "Intro");
-		if (!SRegLoadValue("Diablo", value_name, 0, (int *)&hInstance))
-			hInstance = (HINSTANCE)1;
-		if (hInstance)
-			play_movie("gendata\\diablo1.smk", 1);
-		SRegSaveValue("Diablo", value_name, 0, 0);
+			play_movie("gendata\\logo.smk", TRUE);
+
+		char szValueName[] = "Intro";
+		if(!SRegLoadValue("Diablo", szValueName, 0, &nData))
+			nData = 1;
+		if(nData)
+			play_movie("gendata\\diablo1.smk", TRUE);
+		SRegSaveValue("Diablo", szValueName, 0, 0);
+
 #ifdef _DEBUG
-		if (showintrodebug) {
+		if(showintrodebug) {
+#endif
 			UiTitleDialog(7);
 			BlackPalette();
+#ifdef _DEBUG
 		}
-#else
-		UiTitleDialog(7);
-		BlackPalette();
 #endif
+
 		mainmenu_loop();
 		UiDestroy();
 		SaveGamma();
-		if (ghMainWnd) {
+
+		if(ghMainWnd) {
 			Sleep(300);
 			DestroyWindow(ghMainWnd);
 		}
 	}
-	return 0;
+
+	return FALSE;
 }
 
 void __fastcall diablo_parse_flags(char *args)
diff --git a/Source/diablo.h b/Source/diablo.h
index 44f97f438..08790fe99 100644
--- a/Source/diablo.h
+++ b/Source/diablo.h
@@ -41,8 +41,8 @@ int __fastcall diablo_init_menu(int a1, int bSinglePlayer);
 void __fastcall run_game_loop(int uMsg);
 void __fastcall start_game(int uMsg);
 void __cdecl free_game();
-bool __cdecl diablo_get_not_running();
-int __stdcall WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd);
+BOOL __cdecl diablo_get_not_running();
+int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow);
 void __fastcall diablo_parse_flags(char *args);
 void __cdecl diablo_init_screen();
 BOOL __fastcall diablo_find_window(LPCSTR lpClassName);
diff --git a/Source/effects.cpp b/Source/effects.cpp
index 849f55afc..06fd2541a 100644
--- a/Source/effects.cpp
+++ b/Source/effects.cpp
@@ -1042,12 +1042,21 @@ void __fastcall PlaySFX_priv(TSFX *pSFX, BOOL loc, int x, int y)
 
 void __fastcall stream_play(TSFX *pSFX, int lVolume, int lPan)
 {
+	/// ASSERT: assert(pSFX);
+	/// ASSERT: assert(pSFX->bFlags & sfx_STREAM);
 	sfx_stop();
 	lVolume += sound_get_or_set_sound_volume(1);
 	if (lVolume >= VOLUME_MIN) {
 		if (lVolume > VOLUME_MAX)
 			lVolume = VOLUME_MAX;
-		if (!SFileOpenFile(pSFX->pszName, &sfx_stream)) {
+#ifdef _DEBUG
+		SFileEnableDirectAccess(FALSE);
+#endif
+		BOOL success = SFileOpenFile(pSFX->pszName, &sfx_stream);
+#ifdef _DEBUG
+		SFileEnableDirectAccess(TRUE);
+#endif
+		if (!success) {
 			sfx_stream = 0;
 		} else {
 			if (!SFileDdaBeginEx(sfx_stream, 0x40000, 0, 0, lVolume, lPan, 0))
diff --git a/Source/sound.cpp b/Source/sound.cpp
index 64ec9c4fc..787274785 100644
--- a/Source/sound.cpp
+++ b/Source/sound.cpp
@@ -367,9 +367,16 @@ void __cdecl music_stop()
 
 void __fastcall music_start(int nTrack)
 {
+	/// ASSERT: assert((DWORD) nTrack < NUM_MUSIC);
 	music_stop();
 	if (sglpDS && gbMusicOn) {
+#ifdef _DEBUG
+		SFileEnableDirectAccess(FALSE);
+#endif
 		BOOL success = SFileOpenFile(sgszMusicTracks[nTrack], &sgpMusicTrack);
+#ifdef _DEBUG
+		SFileEnableDirectAccess(TRUE);
+#endif
 		sound_create_primary_buffer(sgpMusicTrack);
 		if (!success) {
 			sgpMusicTrack = 0;