diff --git a/reactos/subsystems/win32/win32k/ntuser/misc.c b/reactos/subsystems/win32/win32k/ntuser/misc.c
index df101ba951b..0c07bf7cd13 100644
--- a/reactos/subsystems/win32/win32k/ntuser/misc.c
+++ b/reactos/subsystems/win32/win32k/ntuser/misc.c
@@ -1434,94 +1434,6 @@ IntSystemParametersInfo(
    return TRUE;
 }
 
-static BOOL 
-UserSystemParametersInfo_StructSet(
-    UINT uiAction,
-    UINT uiParam,
-    PVOID pvParam,
-    UINT fWinIni,
-    PVOID pBuffer, /* private kmode buffer */
-    UINT cbSize    /* size of buffer and expected size usermode data, pointed by pvParam  */
-    )
-{
-    NTSTATUS Status = STATUS_SUCCESS;
-    _SEH_TRY
-    {
-        ProbeForRead(pvParam, cbSize, 1);
-        RtlCopyMemory(pBuffer,pvParam,cbSize);
-    }
-    _SEH_HANDLE
-    {
-        Status = _SEH_GetExceptionCode();
-    }
-    _SEH_END;
-    if(!NT_SUCCESS(Status))
-    {
-        SetLastNtError(Status);
-        return( FALSE);
-    }
-    if(*(PUINT)pBuffer != cbSize)
-    {
-        SetLastWin32Error(ERROR_INVALID_PARAMETER);
-        return( FALSE);
-    }
-    return IntSystemParametersInfo(uiAction, uiParam, pBuffer, fWinIni);
-}
-
-static BOOL 
-UserSystemParametersInfo_StructGet(
-    UINT uiAction,
-    UINT uiParam,
-    PVOID pvParam,
-    UINT fWinIni,
-    PVOID pBuffer, /* private kmode buffer */
-    UINT cbSize    /* size of buffer and expected size usermode data, pointed by pvParam  */
-    )
-{
-    NTSTATUS Status = STATUS_SUCCESS;
-    _SEH_TRY
-    {
-        ProbeForRead(pvParam, cbSize, 1);
-        /* Copy only first UINT describing structure size*/
-        *((PUINT)pBuffer) = *((PUINT)pvParam);
-    }
-    _SEH_HANDLE
-    {
-        Status = _SEH_GetExceptionCode();
-    }
-    _SEH_END;
-    if(!NT_SUCCESS(Status))
-    {
-        SetLastNtError(Status);
-        return( FALSE);
-    }
-    if(uiParam != cbSize || *((PUINT)pBuffer) != cbSize)
-    {
-        SetLastWin32Error(ERROR_INVALID_PARAMETER);
-        return( FALSE);
-    }
-    if(!IntSystemParametersInfo(uiAction, uiParam, pBuffer, fWinIni))
-    {
-        return( FALSE);
-    }
-    _SEH_TRY
-    {
-        ProbeForWrite(pvParam,  cbSize, 1);
-        RtlCopyMemory(pvParam,pBuffer,cbSize);
-    }
-    _SEH_HANDLE
-    {
-        Status = _SEH_GetExceptionCode();
-    }
-    _SEH_END;
-    if(!NT_SUCCESS(Status))
-    {
-        SetLastNtError(Status);
-        return( FALSE);
-    }
-    return( TRUE);
-}
-
 /*
  * @implemented
  */
@@ -1713,125 +1625,64 @@ UserSystemParametersInfo(
               }
               return( TRUE);
           }
-      case SPI_GETICONMETRICS:
-          {
-              ICONMETRICSW Buffer;  
-              return UserSystemParametersInfo_StructGet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_SETICONMETRICS:
-          {
-              ICONMETRICSW Buffer;  
-              return UserSystemParametersInfo_StructSet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
       case SPI_GETMINIMIZEDMETRICS:
-          {
-              MINIMIZEDMETRICS Buffer;  
-              return UserSystemParametersInfo_StructGet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
       case SPI_SETMINIMIZEDMETRICS:
           {
-              MINIMIZEDMETRICS Buffer;  
-              return UserSystemParametersInfo_StructSet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
+            MINIMIZEDMETRICS minimetrics;
+
+            Status = MmCopyFromCaller(&minimetrics, pvParam, sizeof(MINIMIZEDMETRICS));
+            if(!NT_SUCCESS(Status))
+            {
+               SetLastNtError(Status);
+               return( FALSE);
+            }
+            if(minimetrics.cbSize != sizeof(MINIMIZEDMETRICS))
+            {
+               SetLastWin32Error(ERROR_INVALID_PARAMETER);
+               return( FALSE);
+            }
+            if(!IntSystemParametersInfo(uiAction, uiParam, &minimetrics, fWinIni))
+            {
+               return( FALSE);
+            }
+
+            Status = MmCopyToCaller(pvParam, &minimetrics, sizeof(MINIMIZEDMETRICS));
+            if(!NT_SUCCESS(Status))
+            {
+               SetLastNtError(Status);
+               return( FALSE);
+            }
+            return( TRUE);
           }
       case SPI_GETNONCLIENTMETRICS:
-          {
-              NONCLIENTMETRICS Buffer;  
-              return UserSystemParametersInfo_StructGet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
       case SPI_SETNONCLIENTMETRICS:
           {
-              NONCLIENTMETRICS Buffer;  
-              return UserSystemParametersInfo_StructSet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_GETANIMATION:
-          {
-              ANIMATIONINFO Buffer;  
-              return UserSystemParametersInfo_StructGet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_SETANIMATION:
-          {
-              ANIMATIONINFO Buffer;  
-              return UserSystemParametersInfo_StructSet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_GETACCESSTIMEOUT:
-          {
-              ACCESSTIMEOUT Buffer;  
-              return UserSystemParametersInfo_StructGet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_SETACCESSTIMEOUT:
-          {
-              ACCESSTIMEOUT Buffer;  
-              return UserSystemParametersInfo_StructSet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_GETFILTERKEYS:
-          {
-              FILTERKEYS Buffer;  
-              return UserSystemParametersInfo_StructGet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_SETFILTERKEYS:
-          {
-              FILTERKEYS Buffer;  
-              return UserSystemParametersInfo_StructSet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_GETHIGHCONTRAST:
-          {
-              HIGHCONTRAST Buffer;  
-              return UserSystemParametersInfo_StructGet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_SETHIGHCONTRAST:
-          {
-              HIGHCONTRAST Buffer;  
-              return UserSystemParametersInfo_StructSet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_GETSOUNDSENTRY:
-          {
-              SOUNDSENTRY Buffer;  
-              return UserSystemParametersInfo_StructGet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_SETSOUNDSENTRY:
-          {
-              SOUNDSENTRY Buffer;  
-              return UserSystemParametersInfo_StructSet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_GETSTICKYKEYS:
-          {
-              STICKYKEYS Buffer;  
-              return UserSystemParametersInfo_StructGet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_SETSTICKYKEYS:
-          {
-              STICKYKEYS Buffer;  
-              return UserSystemParametersInfo_StructSet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_GETTOGGLEKEYS:
-          {
-              TOGGLEKEYS Buffer;  
-              return UserSystemParametersInfo_StructGet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
-          }
-      case SPI_SETTOGGLEKEYS:
-          {
-              TOGGLEKEYS Buffer;  
-              return UserSystemParametersInfo_StructSet(uiAction, uiParam, pvParam, fWinIni,
-                  &Buffer,sizeof(Buffer));
+            NONCLIENTMETRICSW metrics;
+
+            Status = MmCopyFromCaller(&metrics, pvParam, sizeof(NONCLIENTMETRICSW));
+            if(!NT_SUCCESS(Status))
+            {
+               SetLastNtError(Status);
+               return( FALSE);
+            }
+            if(metrics.cbSize != sizeof(NONCLIENTMETRICSW))
+            {
+               SetLastWin32Error(ERROR_INVALID_PARAMETER);
+               return( FALSE);
+            }
+
+            if(!IntSystemParametersInfo(uiAction, uiParam, &metrics, fWinIni))
+            {
+               return( FALSE);
+            }
+
+            Status = MmCopyToCaller(pvParam, &metrics, sizeof(NONCLIENTMETRICSW));
+            if(!NT_SUCCESS(Status))
+            {
+               SetLastNtError(Status);
+               return( FALSE);
+            }
+            return( TRUE);
           }
       case SPI_SETWORKAREA:
           {
@@ -1921,26 +1772,7 @@ UserSystemParametersInfo(
               }
               return( TRUE);
           }
-      case SPI_SETICONTITLELOGFONT:
-          {
-              LOGFONTW LogFont;
-              _SEH_TRY
-              {
-                  ProbeForRead(pvParam, sizeof( LOGFONTW ), 1);
-                  RtlCopyMemory(&LogFont,pvParam,sizeof(LOGFONTW));
-              }
-              _SEH_HANDLE
-              {
-                  Status = _SEH_GetExceptionCode();
-              }
-              _SEH_END;
-              if(!NT_SUCCESS(Status))
-              {
-                  SetLastNtError(Status);
-                  return( FALSE);
-              }
-              return IntSystemParametersInfo(uiAction, uiParam, &LogFont, fWinIni);
-          }
+
       case SPI_GETICONTITLELOGFONT:
           {
               LOGFONTW LogFont;
@@ -1965,35 +1797,6 @@ UserSystemParametersInfo(
               }
               return( TRUE);
           }
-      case SPI_ICONVERTICALSPACING:
-      case SPI_ICONHORIZONTALSPACING:
-          {
-              UINT Ret;
-              if(!IntSystemParametersInfo(uiAction, uiParam, &Ret, fWinIni))
-              {
-                  return( FALSE);
-              }
-              if(NULL != pvParam)
-              {
-                  _SEH_TRY
-                  {
-                      ProbeForWrite(pvParam, sizeof(UINT ), 1);
-                      *(PUINT)pvParam = Ret;
-                  }
-                  _SEH_HANDLE
-                  {
-                      Status = _SEH_GetExceptionCode();
-                  }
-                  _SEH_END;
-                  if(!NT_SUCCESS(Status))
-                  {
-                      SetLastNtError(Status);
-                      return( FALSE);
-                  }
-              }
-              return( TRUE);
-          }
-      case SPI_SETDEFAULTINPUTLANG:
       case SPI_SETDESKWALLPAPER:     /* !!! As opposed to the user mode version this version accepts a handle
                                          to the bitmap! */
           {
@@ -2015,7 +1818,6 @@ UserSystemParametersInfo(
               }
               return IntSystemParametersInfo(uiAction, uiParam, &Handle, fWinIni);
           }
-      case SPI_GETDEFAULTINPUTLANG:
       case SPI_GETDESKWALLPAPER:
           {
               HANDLE Handle;