diff --git a/intern/ghost/intern/GHOST_ContextWGL.cc b/intern/ghost/intern/GHOST_ContextWGL.cc
index ee9aca5a73d..2b832100769 100644
--- a/intern/ghost/intern/GHOST_ContextWGL.cc
+++ b/intern/ghost/intern/GHOST_ContextWGL.cc
@@ -159,10 +159,6 @@ static int weight_pixel_format(PIXELFORMATDESCRIPTOR &pfd, PIXELFORMATDESCRIPTOR
   if (preferredPFD.cAlphaBits > 0 && pfd.cAlphaBits > 0) {
     weight++;
   }
-#ifdef WIN32_COMPOSITING
-  if ((preferredPFD.dwFlags & PFD_SUPPORT_COMPOSITION) && (pfd.dwFlags & PFD_SUPPORT_COMPOSITION))
-    weight++;
-#endif
 
   return weight;
 }
@@ -339,15 +335,9 @@ struct DummyContextWGL {
         1,                             /* version */
         (DWORD)(PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW |
                 PFD_DOUBLEBUFFER |                /* support double-buffering */
-                (stereoVisual ? PFD_STEREO : 0) | /* support stereo */
-                (
-#ifdef WIN32_COMPOSITING
-                    /* Support composition for transparent background. */
-                    needAlpha ? PFD_SUPPORT_COMPOSITION :
-#endif
-                                0)),
-        PFD_TYPE_RGBA,               /* color type */
-        (BYTE)(needAlpha ? 32 : 24), /* preferred color depth */
+                (stereoVisual ? PFD_STEREO : 0)), /* support stereo */
+        PFD_TYPE_RGBA,                            /* color type */
+        (BYTE)(needAlpha ? 32 : 24),              /* preferred color depth */
         0,
         0,
         0,
@@ -461,26 +451,6 @@ int GHOST_ContextWGL::_choose_pixel_format_arb_1(bool stereoVisual, bool needAlp
 
   if (nNumFormats > 0) {
     iPixelFormat = iPixelFormats[0];
-
-#ifdef WIN32_COMPOSITING
-    if (needAlpha) {
-      // scan through all pixel format to make sure one supports compositing
-      PIXELFORMATDESCRIPTOR pfd;
-      int i;
-
-      for (i = 0; i < nNumFormats; i++) {
-        if (DescribePixelFormat(m_hDC, iPixelFormats[i], sizeof(PIXELFORMATDESCRIPTOR), &pfd)) {
-          if (pfd.dwFlags & PFD_SUPPORT_COMPOSITION) {
-            iPixelFormat = iPixelFormats[i];
-            break;
-          }
-        }
-      }
-      if (i == nNumFormats) {
-        fprintf(stderr, "Warning! Unable to find a pixel format with compositing capability.\n");
-      }
-    }
-#endif
   }
 
   // check pixel format
diff --git a/intern/ghost/intern/GHOST_ContextWGL.hh b/intern/ghost/intern/GHOST_ContextWGL.hh
index b6771a7e5f5..05e53982c1f 100644
--- a/intern/ghost/intern/GHOST_ContextWGL.hh
+++ b/intern/ghost/intern/GHOST_ContextWGL.hh
@@ -8,8 +8,6 @@
 
 #pragma once
 
-// #define WIN32_COMPOSITING
-
 #include "GHOST_Context.hh"
 
 #include <epoxy/wgl.h>
diff --git a/intern/ghost/intern/GHOST_SystemWin32.cc b/intern/ghost/intern/GHOST_SystemWin32.cc
index 8e55da166c5..570cd0b1296 100644
--- a/intern/ghost/intern/GHOST_SystemWin32.cc
+++ b/intern/ghost/intern/GHOST_SystemWin32.cc
@@ -285,7 +285,6 @@ GHOST_IWindow *GHOST_SystemWin32::createWindow(const char *title,
       state,
       gpuSettings.context_type,
       ((gpuSettings.flags & GHOST_gpuStereoVisual) != 0),
-      false,
       (GHOST_WindowWin32 *)parentWindow,
       ((gpuSettings.flags & GHOST_gpuDebugContext) != 0),
       is_dialog,
@@ -618,11 +617,7 @@ GHOST_TSuccess GHOST_SystemWin32::init()
       ::LoadIcon(nullptr, IDI_APPLICATION);
     }
     wc.hCursor = ::LoadCursor(0, IDC_ARROW);
-    wc.hbrBackground =
-#ifdef INW32_COMPISITING
-        (HBRUSH)CreateSolidBrush
-#endif
-        (HBRUSH) GetStockObject(DKGRAY_BRUSH);
+    wc.hbrBackground = (HBRUSH)GetStockObject(DKGRAY_BRUSH);
     wc.lpszMenuName = 0;
     wc.lpszClassName = L"GHOST_WindowClass";
 
diff --git a/intern/ghost/intern/GHOST_WindowWin32.cc b/intern/ghost/intern/GHOST_WindowWin32.cc
index 54926323aba..ebc5182aa0c 100644
--- a/intern/ghost/intern/GHOST_WindowWin32.cc
+++ b/intern/ghost/intern/GHOST_WindowWin32.cc
@@ -60,7 +60,6 @@ GHOST_WindowWin32::GHOST_WindowWin32(GHOST_SystemWin32 *system,
                                      GHOST_TWindowState state,
                                      GHOST_TDrawingContextType type,
                                      bool wantStereoVisual,
-                                     bool alphaBackground,
                                      GHOST_WindowWin32 *parentwindow,
                                      bool is_debug,
                                      bool dialog,
@@ -78,7 +77,6 @@ GHOST_WindowWin32::GHOST_WindowWin32(GHOST_SystemWin32 *system,
       m_hasGrabMouse(false),
       m_nPressedButtons(0),
       m_customCursor(0),
-      m_wantAlphaBackground(alphaBackground),
       m_Bar(nullptr),
       m_wintab(nullptr),
       m_lastPointerTabletData(GHOST_TABLET_DATA_NONE),
@@ -210,25 +208,6 @@ GHOST_WindowWin32::GHOST_WindowWin32(GHOST_SystemWin32 *system,
 
   ::ShowWindow(m_hWnd, nCmdShow);
 
-#ifdef WIN32_COMPOSITING
-  if (alphaBackground && parentwindowhwnd == 0) {
-
-    HRESULT hr = S_OK;
-
-    /* Create and populate the Blur Behind structure. */
-    DWM_BLURBEHIND bb = {0};
-
-    /* Enable Blur Behind and apply to the entire client area. */
-    bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
-    bb.fEnable = true;
-    bb.hRgnBlur = CreateRectRgn(0, 0, -1, -1);
-
-    /* Apply Blur Behind. */
-    hr = DwmEnableBlurBehindWindow(m_hWnd, &bb);
-    DeleteObject(bb.hRgnBlur);
-  }
-#endif
-
   /* Initialize WINTAB. */
   if (system->getTabletAPI() != GHOST_kTabletWinPointer) {
     loadWintab(GHOST_kWindowStateMinimized != state);
@@ -656,7 +635,7 @@ GHOST_Context *GHOST_WindowWin32::newDrawingContext(GHOST_TDrawingContextType ty
       for (int minor = 6; minor >= 3; --minor) {
         GHOST_Context *context = new GHOST_ContextWGL(
             m_wantStereoVisual,
-            m_wantAlphaBackground,
+            false,
             m_hWnd,
             m_hDC,
             WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
diff --git a/intern/ghost/intern/GHOST_WindowWin32.hh b/intern/ghost/intern/GHOST_WindowWin32.hh
index eb2b83dbb94..d47c71465b2 100644
--- a/intern/ghost/intern/GHOST_WindowWin32.hh
+++ b/intern/ghost/intern/GHOST_WindowWin32.hh
@@ -77,7 +77,6 @@ class GHOST_WindowWin32 : public GHOST_Window {
                     GHOST_TWindowState state,
                     GHOST_TDrawingContextType type,
                     bool wantStereoVisual,
-                    bool alphaBackground,
                     GHOST_WindowWin32 *parentWindow,
                     bool is_debug,
                     bool dialog,
@@ -394,8 +393,6 @@ class GHOST_WindowWin32 : public GHOST_Window {
   int m_nPressedButtons;
   /** HCURSOR structure of the custom cursor. */
   HCURSOR m_customCursor;
-  /** Request GL context with alpha channel. */
-  bool m_wantAlphaBackground;
 
   /** ITaskbarList3 structure for progress bar. */
   ITaskbarList3 *m_Bar;