diff --git a/src/command.c b/src/command.c
index 0afc07118..0991519d9 100644
--- a/src/command.c
+++ b/src/command.c
@@ -2034,7 +2034,7 @@ static boolean CV_FilterVarByVersion(consvar_t *v, const char *valstr)
 
 		// JOYSTICK DEFAULTS
 		// use_joystick was changed from 0 to 1 to automatically use a joystick if available
-#if defined(HAVE_SDL) || defined(_WINDOWS)
+#if defined(HAVE_SDL)
 		if ((!stricmp(v->name, "use_joystick")
 			|| !stricmp(v->name, "use_joystick2"))
 			&& atoi(valstr) == 0)
diff --git a/src/console.c b/src/console.c
index 01d1ddaa2..5df21c9b7 100644
--- a/src/console.c
+++ b/src/console.c
@@ -33,10 +33,6 @@
 #include "m_menu.h"
 #include "filesrch.h"
 
-#ifdef _WINDOWS
-#include "win32/win_main.h"
-#endif
-
 #ifdef HWRENDER
 #include "hardware/hw_main.h"
 #endif
@@ -1292,19 +1288,9 @@ void CONS_Printf(const char *fmt, ...)
 	// if not in display loop, force screen update
 	if (con_startup && (!setrenderneeded))
 	{
-#ifdef _WINDOWS
-		patch_t *con_backpic = W_CachePatchName("CONSBACK", PU_PATCH);
-
-		// Jimita: CON_DrawBackpic just called V_DrawScaledPatch
-		V_DrawScaledPatch(0, 0, 0, con_backpic);
-
-		W_UnlockCachedPatch(con_backpic);
-		I_LoadingScreen(txt);				// Win32/OS2 only
-#else
 		// here we display the console text
 		CON_Drawer();
 		I_FinishUpdate(); // page flip or blit buffer
-#endif
 	}
 }
 
diff --git a/src/d_main.c b/src/d_main.c
index 469dbfecd..9e697597c 100644
--- a/src/d_main.c
+++ b/src/d_main.c
@@ -83,10 +83,6 @@ int	snprintf(char *str, size_t n, const char *fmt, ...);
 #include "hardware/hw_main.h" // 3D View Rendering
 #endif
 
-#ifdef _WINDOWS
-#include "win32/win_main.h" // I_DoStartupMouse
-#endif
-
 #ifdef HW3SOUND
 #include "hardware/hw3sound.h"
 #endif
@@ -626,11 +622,6 @@ void D_SRB2Loop(void)
 
 	// Pushing of + parameters is now done back in D_SRB2Main, not here.
 
-#ifdef _WINDOWS
-	CONS_Printf("I_StartupMouse()...\n");
-	I_DoStartupMouse();
-#endif
-
 	oldentertics = I_GetTime();
 
 	// end of loading screen: CONS_Printf() will no more call FinishUpdate()
@@ -1071,9 +1062,7 @@ void D_SRB2Main(void)
 #endif
 
 	// for dedicated server
-#if !defined (_WINDOWS) //already check in win_main.c
 	dedicated = M_CheckParm("-dedicated") != 0;
-#endif
 
 #ifdef PC_DOS
 	D_Titlebar();
diff --git a/src/d_netcmd.c b/src/d_netcmd.c
index 527edd35e..4e5625340 100644
--- a/src/d_netcmd.c
+++ b/src/d_netcmd.c
@@ -3557,8 +3557,6 @@ static void Command_Version_f(void)
 	// Base library
 #if defined( HAVE_SDL)
 	CONS_Printf("SDL ");
-#elif defined(_WINDOWS)
-	CONS_Printf("DD ");
 #endif
 
 	// OS
diff --git a/src/doomdef.h b/src/doomdef.h
index 7bab60442..8d00d407a 100644
--- a/src/doomdef.h
+++ b/src/doomdef.h
@@ -47,17 +47,6 @@
 #endif
 #endif
 
-#ifdef _WINDOWS
-#define NONET
-#if !defined (HWRENDER) && !defined (NOHW)
-#define HWRENDER
-#endif
-// judgecutor: 3D sound support
-#if !defined(HW3SOUND) && !defined (NOHS)
-#define HW3SOUND
-#endif
-#endif
-
 #ifdef _WIN32
 #define ASMCALL __cdecl
 #else
diff --git a/src/hardware/hw_dll.h b/src/hardware/hw_dll.h
index 3fa5852d8..712240cea 100644
--- a/src/hardware/hw_dll.h
+++ b/src/hardware/hw_dll.h
@@ -27,18 +27,10 @@
 // __declspec(dllexport) <return->type> (WINAPI *<function-name>) (<arguments>);
 
 #ifdef _CREATE_DLL_
- #ifdef _WINDOWS
-  #ifdef __cplusplus
-   #define EXPORT  extern "C" __declspec(dllexport)
-  #else
-   #define EXPORT  __declspec(dllexport)
-  #endif
+ #ifdef __cplusplus
+  #define EXPORT  extern "C"
  #else
-  #ifdef __cplusplus
-   #define EXPORT  extern "C"
-  #else
-   #define EXPORT
-  #endif
+  #define EXPORT
  #endif
  #ifdef _WIN32
   #define HWRAPI(fn)  WINAPI fn
@@ -65,9 +57,7 @@ typedef void (*I_Error_t) (const char *error, ...) FUNCIERROR;
 
 void DBG_Printf(const char *lpFmt, ...) /*FUNCPRINTF*/;
 
-#ifdef _WINDOWS
-BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
-#elif defined (__CYGWIN__)
+#if defined (__CYGWIN__)
 void _init() __attribute__((constructor));
 void _fini() __attribute__((destructor));
 #else
diff --git a/src/hardware/hw_drv.h b/src/hardware/hw_drv.h
index 3314fb015..3892220d5 100644
--- a/src/hardware/hw_drv.h
+++ b/src/hardware/hw_drv.h
@@ -36,9 +36,6 @@ EXPORT boolean HWRAPI(Init) (I_Error_t ErrorFunction);
 #ifndef HAVE_SDL
 EXPORT void HWRAPI(Shutdown) (void);
 #endif
-#ifdef _WINDOWS
-EXPORT void HWRAPI(GetModeList) (vmode_t **pvidmodes, INT32 *numvidmodes);
-#endif
 EXPORT void HWRAPI(SetPalette) (RGBA_t *ppal);
 EXPORT void HWRAPI(FinishUpdate) (INT32 waitvbl);
 EXPORT void HWRAPI(Draw2DLine) (F2DCoord *v1, F2DCoord *v2, RGBA_t Color);
@@ -97,9 +94,6 @@ struct hwdriver_s
 	SetTransform        pfnSetTransform;
 	GetTextureUsed      pfnGetTextureUsed;
 	GetRenderVersion    pfnGetRenderVersion;
-#ifdef _WINDOWS
-	GetModeList         pfnGetModeList;
-#endif
 #ifndef HAVE_SDL
 	Shutdown            pfnShutdown;
 #endif
diff --git a/src/hardware/s_ds3d/s_ds3d.c b/src/hardware/s_ds3d/s_ds3d.c
index 5299c1795..410681d57 100644
--- a/src/hardware/s_ds3d/s_ds3d.c
+++ b/src/hardware/s_ds3d/s_ds3d.c
@@ -125,49 +125,6 @@ enum {IS_2DSOURCE = 0, IS_3DSOURCE = 1};
 
 #define NEW_HANDLE  -1
 
-#ifdef _WINDOWS
-BOOL WINAPI DllMain(HINSTANCE hinstDLL, // handle to DLL module
-                    DWORD fdwReason,    // reason for calling function
-                    LPVOID lpvReserved) // reserved
-{
-	// Perform actions based on the reason for calling
-	UNREFERENCED_PARAMETER(lpvReserved);
-	switch ( fdwReason )
-	{
-		case DLL_PROCESS_ATTACH:
-			// Initialize once for each new process.
-			// Return FALSE to fail DLL load.
-#ifdef DEBUG_TO_FILE
-			logstream = fopen("s_ds3d.log", "wt");
-			if (logstream == NULL)
-				return FALSE;
-#endif
-			DisableThreadLibraryCalls(hinstDLL);
-			break;
-
-		case DLL_THREAD_ATTACH:
-			// Do thread-specific initialization.
-			break;
-
-		case DLL_THREAD_DETACH:
-			// Do thread-specific cleanup.
-			break;
-
-		case DLL_PROCESS_DETACH:
-			// Perform any necessary cleanup.
-#ifdef DEBUG_TO_FILE
-			if (logstream)
-			{
-				fclose(logstream);
-				logstream = NULL;
-			}
-#endif
-			break;
-	}
-	return TRUE;  // Successful DLL_PROCESS_ATTACH.
-}
-#endif
-
 // **************************************************************************
 //                                                                  FUNCTIONS
 // **************************************************************************
diff --git a/src/m_menu.c b/src/m_menu.c
index d9ea6bae1..ae3ac91d7 100644
--- a/src/m_menu.c
+++ b/src/m_menu.c
@@ -1407,9 +1407,7 @@ static menuitem_t OP_OpenGLOptionsMenu[] =
 #ifdef ALAM_LIGHTING
 	{IT_SUBMENU|IT_STRING,      NULL, "Lighting...",     &OP_OpenGLLightingDef,     134},
 #endif
-#if defined (_WINDOWS) && (!((defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)))
 	{IT_STRING|IT_CVAR,         NULL, "Fullscreen",      &cv_fullscreen,            144},
-#endif
 };
 
 #ifdef ALAM_LIGHTING
@@ -11924,16 +11922,8 @@ static void M_VideoModeMenu(INT32 choice)
 	vidm_selected = 0;
 	nummodes = VID_NumModes();
 
-#ifdef _WINDOWS
-	// clean that later: skip windowed mode 0, video modes menu only shows FULL SCREEN modes
-	if (nummodes <= NUMSPECIALMODES)
-		i = 0; // unless we have nothing
-	else
-		i = NUMSPECIALMODES;
-#else
 	// DOS does not skip mode 0, because mode 0 is ALWAYS present
 	i = 0;
-#endif
 	for (; i < nummodes && vidm_nummodes < MAXMODEDESCS; i++)
 	{
 		desc = VID_GetModeName(i);
diff --git a/src/s_sound.c b/src/s_sound.c
index 1f46b3755..d8950bf04 100644
--- a/src/s_sound.c
+++ b/src/s_sound.c
@@ -79,15 +79,7 @@ consvar_t sndserver_cmd = {"sndserver_cmd", "llsndserv", CV_SAVE, NULL, 0, NULL,
 consvar_t sndserver_arg = {"sndserver_arg", "-quiet", CV_SAVE, NULL, 0, NULL, NULL, 0, 0, NULL};
 #endif
 
-#if defined (_WINDOWS) && !defined (SURROUND) //&& defined (_X86_)
-#define SURROUND
-#endif
-
-#ifdef _WINDOWS
-consvar_t cv_samplerate = {"samplerate", "44100", 0, CV_Unsigned, NULL, 44100, NULL, NULL, 0, 0, NULL}; //Alam: For easy hacking?
-#else
 consvar_t cv_samplerate = {"samplerate", "22050", 0, CV_Unsigned, NULL, 22050, NULL, NULL, 0, 0, NULL}; //Alam: For easy hacking?
-#endif
 
 // stereo reverse
 consvar_t stereoreverse = {"stereoreverse", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};